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[thirdparty/binutils-gdb.git] / bfd / elf64-s390.c
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a85d7ed0 1/* IBM S/390-specific support for 64-bit ELF
a2c58332 2 Copyright (C) 2000-2022 Free Software Foundation, Inc.
a85d7ed0
NC		 3 Contributed Martin Schwidefsky (schwidefsky@de.ibm.com).
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
cd123cb7 9 the Free Software Foundation; either version 3 of the License, or
a85d7ed0
NC		 10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
3e110533 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
53e09e0a 20 02110-1301, USA. */
a85d7ed0 21
a85d7ed0 22#include "sysdep.h"
3db64b00 23#include "bfd.h"
a85d7ed0
NC		 24#include "bfdlink.h"
25#include "libbfd.h"
26#include "elf-bfd.h"
a85d7ed0 27#include "elf/s390.h"
b4cbbe8f 28#include "elf-s390.h"
e3e9290d 29#include <stdarg.h>
a85d7ed0
NC		 30
31/* In case we're on a 32-bit machine, construct a 64-bit "-1" value
32 from smaller values. Start with zero, widen, *then* decrement. */
33#define MINUS_ONE (((bfd_vma)0) - 1)
34
2c3fc389
NC		 35static bfd_reloc_status_type
36s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
37 asection *, bfd *, char **);
38static bfd_reloc_status_type
39s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
40 asection *, bfd *, char **);
41
a85d7ed0
NC		 42/* The relocation "howto" table. */
43static reloc_howto_type elf_howto_table[] =
44{
45 HOWTO (R_390_NONE, /* type */
46 0, /* rightshift */
c94cb026 47 0, /* size */
a85d7ed0 48 0, /* bitsize */
0a1b45a2 49 false, /* pc_relative */
a85d7ed0
NC		 50 0, /* bitpos */
51 complain_overflow_dont, /* complain_on_overflow */
52 bfd_elf_generic_reloc, /* special_function */
53 "R_390_NONE", /* name */
0a1b45a2 54 false, /* partial_inplace */
a85d7ed0
NC		 55 0, /* src_mask */
56 0, /* dst_mask */
0a1b45a2
AM		 57 false), /* pcrel_offset */
58
c94cb026 59 HOWTO(R_390_8, 0, 1, 8, false, 0, complain_overflow_bitfield,
0a1b45a2 60 bfd_elf_generic_reloc, "R_390_8", false, 0,0x000000ff, false),
c94cb026 61 HOWTO(R_390_12, 0, 2, 12, false, 0, complain_overflow_dont,
0a1b45a2 62 bfd_elf_generic_reloc, "R_390_12", false, 0,0x00000fff, false),
c94cb026 63 HOWTO(R_390_16, 0, 2, 16, false, 0, complain_overflow_bitfield,
0a1b45a2 64 bfd_elf_generic_reloc, "R_390_16", false, 0,0x0000ffff, false),
c94cb026 65 HOWTO(R_390_32, 0, 4, 32, false, 0, complain_overflow_bitfield,
0a1b45a2 66 bfd_elf_generic_reloc, "R_390_32", false, 0,0xffffffff, false),
c94cb026 67 HOWTO(R_390_PC32, 0, 4, 32, true, 0, complain_overflow_bitfield,
0a1b45a2 68 bfd_elf_generic_reloc, "R_390_PC32", false, 0,0xffffffff, true),
c94cb026 69 HOWTO(R_390_GOT12, 0, 2, 12, false, 0, complain_overflow_bitfield,
0a1b45a2 70 bfd_elf_generic_reloc, "R_390_GOT12", false, 0,0x00000fff, false),
c94cb026 71 HOWTO(R_390_GOT32, 0, 4, 32, false, 0, complain_overflow_bitfield,
0a1b45a2 72 bfd_elf_generic_reloc, "R_390_GOT32", false, 0,0xffffffff, false),
c94cb026 73 HOWTO(R_390_PLT32, 0, 4, 32, true, 0, complain_overflow_bitfield,
0a1b45a2 74 bfd_elf_generic_reloc, "R_390_PLT32", false, 0,0xffffffff, true),
c94cb026 75 HOWTO(R_390_COPY, 0, 8, 64, false, 0, complain_overflow_bitfield,
0a1b45a2 76 bfd_elf_generic_reloc, "R_390_COPY", false, 0,MINUS_ONE, false),
c94cb026 77 HOWTO(R_390_GLOB_DAT, 0, 8, 64, false, 0, complain_overflow_bitfield,
0a1b45a2 78 bfd_elf_generic_reloc, "R_390_GLOB_DAT", false, 0,MINUS_ONE, false),
c94cb026 79 HOWTO(R_390_JMP_SLOT, 0, 8, 64, false, 0, complain_overflow_bitfield,
0a1b45a2 80 bfd_elf_generic_reloc, "R_390_JMP_SLOT", false, 0,MINUS_ONE, false),
c94cb026 81 HOWTO(R_390_RELATIVE, 0, 8, 64, true, 0, complain_overflow_bitfield,
0a1b45a2 82 bfd_elf_generic_reloc, "R_390_RELATIVE", false, 0,MINUS_ONE, false),
c94cb026 83 HOWTO(R_390_GOTOFF32, 0, 4, 32, false, 0, complain_overflow_bitfield,
0a1b45a2 84 bfd_elf_generic_reloc, "R_390_GOTOFF32", false, 0,MINUS_ONE, false),
c94cb026 85 HOWTO(R_390_GOTPC, 0, 8, 64, true, 0, complain_overflow_bitfield,
0a1b45a2 86 bfd_elf_generic_reloc, "R_390_GOTPC", false, 0,MINUS_ONE, true),
c94cb026 87 HOWTO(R_390_GOT16, 0, 2, 16, false, 0, complain_overflow_bitfield,
0a1b45a2 88 bfd_elf_generic_reloc, "R_390_GOT16", false, 0,0x0000ffff, false),
c94cb026 89 HOWTO(R_390_PC16, 0, 2, 16, true, 0, complain_overflow_bitfield,
0a1b45a2 90 bfd_elf_generic_reloc, "R_390_PC16", false, 0,0x0000ffff, true),
c94cb026 91 HOWTO(R_390_PC16DBL, 1, 2, 16, true, 0, complain_overflow_bitfield,
0a1b45a2 92 bfd_elf_generic_reloc, "R_390_PC16DBL", false, 0,0x0000ffff, true),
c94cb026 93 HOWTO(R_390_PLT16DBL, 1, 2, 16, true, 0, complain_overflow_bitfield,
0a1b45a2 94 bfd_elf_generic_reloc, "R_390_PLT16DBL", false, 0,0x0000ffff, true),
c94cb026 95 HOWTO(R_390_PC32DBL, 1, 4, 32, true, 0, complain_overflow_bitfield,
0a1b45a2 96 bfd_elf_generic_reloc, "R_390_PC32DBL", false, 0,0xffffffff, true),
c94cb026 97 HOWTO(R_390_PLT32DBL, 1, 4, 32, true, 0, complain_overflow_bitfield,
0a1b45a2 98 bfd_elf_generic_reloc, "R_390_PLT32DBL", false, 0,0xffffffff, true),
c94cb026 99 HOWTO(R_390_GOTPCDBL, 1, 4, 32, true, 0, complain_overflow_bitfield,
0a1b45a2 100 bfd_elf_generic_reloc, "R_390_GOTPCDBL", false, 0,MINUS_ONE, true),
c94cb026 101 HOWTO(R_390_64, 0, 8, 64, false, 0, complain_overflow_bitfield,
0a1b45a2 102 bfd_elf_generic_reloc, "R_390_64", false, 0,MINUS_ONE, false),
c94cb026 103 HOWTO(R_390_PC64, 0, 8, 64, true, 0, complain_overflow_bitfield,
0a1b45a2 104 bfd_elf_generic_reloc, "R_390_PC64", false, 0,MINUS_ONE, true),
c94cb026 105 HOWTO(R_390_GOT64, 0, 8, 64, false, 0, complain_overflow_bitfield,
0a1b45a2 106 bfd_elf_generic_reloc, "R_390_GOT64", false, 0,MINUS_ONE, false),
c94cb026 107 HOWTO(R_390_PLT64, 0, 8, 64, true, 0, complain_overflow_bitfield,
0a1b45a2 108 bfd_elf_generic_reloc, "R_390_PLT64", false, 0,MINUS_ONE, true),
c94cb026 109 HOWTO(R_390_GOTENT, 1, 4, 32, true, 0, complain_overflow_bitfield,
0a1b45a2 110 bfd_elf_generic_reloc, "R_390_GOTENT", false, 0,MINUS_ONE, true),
c94cb026 111 HOWTO(R_390_GOTOFF16, 0, 2, 16, false, 0, complain_overflow_bitfield,
0a1b45a2 112 bfd_elf_generic_reloc, "R_390_GOTOFF16", false, 0,0x0000ffff, false),
c94cb026 113 HOWTO(R_390_GOTOFF64, 0, 8, 64, false, 0, complain_overflow_bitfield,
0a1b45a2 114 bfd_elf_generic_reloc, "R_390_GOTOFF64", false, 0,MINUS_ONE, false),
c94cb026 115 HOWTO(R_390_GOTPLT12, 0, 2, 12, false, 0, complain_overflow_dont,
0a1b45a2 116 bfd_elf_generic_reloc, "R_390_GOTPLT12", false, 0,0x00000fff, false),
c94cb026 117 HOWTO(R_390_GOTPLT16, 0, 2, 16, false, 0, complain_overflow_bitfield,
0a1b45a2 118 bfd_elf_generic_reloc, "R_390_GOTPLT16", false, 0,0x0000ffff, false),
c94cb026 119 HOWTO(R_390_GOTPLT32, 0, 4, 32, false, 0, complain_overflow_bitfield,
0a1b45a2 120 bfd_elf_generic_reloc, "R_390_GOTPLT32", false, 0,0xffffffff, false),
c94cb026 121 HOWTO(R_390_GOTPLT64, 0, 8, 64, false, 0, complain_overflow_bitfield,
0a1b45a2 122 bfd_elf_generic_reloc, "R_390_GOTPLT64", false, 0,MINUS_ONE, false),
c94cb026 123 HOWTO(R_390_GOTPLTENT, 1, 4, 32, true, 0, complain_overflow_bitfield,
0a1b45a2 124 bfd_elf_generic_reloc, "R_390_GOTPLTENT",false, 0,MINUS_ONE, true),
c94cb026 125 HOWTO(R_390_PLTOFF16, 0, 2, 16, false, 0, complain_overflow_bitfield,
0a1b45a2 126 bfd_elf_generic_reloc, "R_390_PLTOFF16", false, 0,0x0000ffff, false),
c94cb026 127 HOWTO(R_390_PLTOFF32, 0, 4, 32, false, 0, complain_overflow_bitfield,
0a1b45a2 128 bfd_elf_generic_reloc, "R_390_PLTOFF32", false, 0,0xffffffff, false),
c94cb026 129 HOWTO(R_390_PLTOFF64, 0, 8, 64, false, 0, complain_overflow_bitfield,
0a1b45a2 130 bfd_elf_generic_reloc, "R_390_PLTOFF64", false, 0,MINUS_ONE, false),
c94cb026 131 HOWTO(R_390_TLS_LOAD, 0, 1, 0, false, 0, complain_overflow_dont,
0a1b45a2 132 s390_tls_reloc, "R_390_TLS_LOAD", false, 0, 0, false),
c94cb026 133 HOWTO(R_390_TLS_GDCALL, 0, 1, 0, false, 0, complain_overflow_dont,
0a1b45a2 134 s390_tls_reloc, "R_390_TLS_GDCALL", false, 0, 0, false),
c94cb026 135 HOWTO(R_390_TLS_LDCALL, 0, 1, 0, false, 0, complain_overflow_dont,
0a1b45a2 136 s390_tls_reloc, "R_390_TLS_LDCALL", false, 0, 0, false),
69fc87f1 137 EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */
c94cb026 138 HOWTO(R_390_TLS_GD64, 0, 8, 64, false, 0, complain_overflow_bitfield,
0a1b45a2 139 bfd_elf_generic_reloc, "R_390_TLS_GD64", false, 0, MINUS_ONE, false),
c94cb026 140 HOWTO(R_390_TLS_GOTIE12, 0, 2, 12, false, 0, complain_overflow_dont,
0a1b45a2 141 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", false, 0, 0x00000fff, false),
69fc87f1 142 EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */
c94cb026 143 HOWTO(R_390_TLS_GOTIE64, 0, 8, 64, false, 0, complain_overflow_bitfield,
0a1b45a2 144 bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", false, 0, MINUS_ONE, false),
69fc87f1 145 EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */
c94cb026 146 HOWTO(R_390_TLS_LDM64, 0, 8, 64, false, 0, complain_overflow_bitfield,
0a1b45a2 147 bfd_elf_generic_reloc, "R_390_TLS_LDM64", false, 0, MINUS_ONE, false),
69fc87f1 148 EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */
c94cb026 149 HOWTO(R_390_TLS_IE64, 0, 8, 64, false, 0, complain_overflow_bitfield,
0a1b45a2 150 bfd_elf_generic_reloc, "R_390_TLS_IE64", false, 0, MINUS_ONE, false),
c94cb026 151 HOWTO(R_390_TLS_IEENT, 1, 4, 32, true, 0, complain_overflow_bitfield,
0a1b45a2 152 bfd_elf_generic_reloc, "R_390_TLS_IEENT", false, 0, MINUS_ONE, true),
69fc87f1 153 EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */
c94cb026 154 HOWTO(R_390_TLS_LE64, 0, 4, 32, false, 0, complain_overflow_bitfield,
0a1b45a2 155 bfd_elf_generic_reloc, "R_390_TLS_LE64", false, 0, MINUS_ONE, false),
69fc87f1 156 EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */
c94cb026 157 HOWTO(R_390_TLS_LDO64, 0, 8, 64, false, 0, complain_overflow_bitfield,
0a1b45a2 158 bfd_elf_generic_reloc, "R_390_TLS_LDO64", false, 0, MINUS_ONE, false),
c94cb026 159 HOWTO(R_390_TLS_DTPMOD, 0, 8, 64, false, 0, complain_overflow_bitfield,
0a1b45a2 160 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", false, 0, MINUS_ONE, false),
c94cb026 161 HOWTO(R_390_TLS_DTPOFF, 0, 8, 64, false, 0, complain_overflow_bitfield,
0a1b45a2 162 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", false, 0, MINUS_ONE, false),
c94cb026 163 HOWTO(R_390_TLS_TPOFF, 0, 8, 64, false, 0, complain_overflow_bitfield,
0a1b45a2 164 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", false, 0, MINUS_ONE, false),
c94cb026 165 HOWTO(R_390_20, 0, 4, 20, false, 8, complain_overflow_dont,
0a1b45a2 166 s390_elf_ldisp_reloc, "R_390_20", false, 0,0x0fffff00, false),
c94cb026 167 HOWTO(R_390_GOT20, 0, 4, 20, false, 8, complain_overflow_dont,
0a1b45a2 168 s390_elf_ldisp_reloc, "R_390_GOT20", false, 0,0x0fffff00, false),
c94cb026 169 HOWTO(R_390_GOTPLT20, 0, 4, 20, false, 8, complain_overflow_dont,
0a1b45a2 170 s390_elf_ldisp_reloc, "R_390_GOTPLT20", false, 0,0x0fffff00, false),
c94cb026 171 HOWTO(R_390_TLS_GOTIE20, 0, 4, 20, false, 8, complain_overflow_dont,
0a1b45a2 172 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", false, 0,0x0fffff00, false),
c94cb026 173 HOWTO(R_390_IRELATIVE, 0, 8, 64, false, 0, complain_overflow_bitfield,
0a1b45a2 174 bfd_elf_generic_reloc, "R_390_IRELATIVE", false, 0, MINUS_ONE, false),
c94cb026 175 HOWTO(R_390_PC12DBL, 1, 2, 12, true, 0, complain_overflow_bitfield,
0a1b45a2 176 bfd_elf_generic_reloc, "R_390_PC12DBL", false, 0,0x00000fff, true),
c94cb026 177 HOWTO(R_390_PLT12DBL, 1, 2, 12, true, 0, complain_overflow_bitfield,
0a1b45a2 178 bfd_elf_generic_reloc, "R_390_PLT12DBL", false, 0,0x00000fff, true),
c94cb026 179 HOWTO(R_390_PC24DBL, 1, 4, 24, true, 0, complain_overflow_bitfield,
0a1b45a2 180 bfd_elf_generic_reloc, "R_390_PC24DBL", false, 0,0x00ffffff, true),
c94cb026 181 HOWTO(R_390_PLT24DBL, 1, 4, 24, true, 0, complain_overflow_bitfield,
0a1b45a2 182 bfd_elf_generic_reloc, "R_390_PLT24DBL", false, 0,0x00ffffff, true),
a85d7ed0
NC		 183};
184
185/* GNU extension to record C++ vtable hierarchy. */
186static reloc_howto_type elf64_s390_vtinherit_howto =
c94cb026 187 HOWTO (R_390_GNU_VTINHERIT, 0,8,0,false,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", false,0, 0, false);
a85d7ed0 188static reloc_howto_type elf64_s390_vtentry_howto =
c94cb026 189 HOWTO (R_390_GNU_VTENTRY, 0,8,0,false,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", false,0,0, false);
a85d7ed0
NC		 190
191static reloc_howto_type *
f3185997 192elf_s390_reloc_type_lookup (bfd *abfd,
2c3fc389 193 bfd_reloc_code_real_type code)
a85d7ed0 194{
0451c93c
MS		 195 switch (code)
196 {
197 case BFD_RELOC_NONE:
198 return &elf_howto_table[(int) R_390_NONE];
199 case BFD_RELOC_8:
200 return &elf_howto_table[(int) R_390_8];
201 case BFD_RELOC_390_12:
202 return &elf_howto_table[(int) R_390_12];
203 case BFD_RELOC_16:
204 return &elf_howto_table[(int) R_390_16];
205 case BFD_RELOC_32:
206 return &elf_howto_table[(int) R_390_32];
207 case BFD_RELOC_CTOR:
208 return &elf_howto_table[(int) R_390_32];
209 case BFD_RELOC_32_PCREL:
210 return &elf_howto_table[(int) R_390_PC32];
211 case BFD_RELOC_390_GOT12:
212 return &elf_howto_table[(int) R_390_GOT12];
213 case BFD_RELOC_32_GOT_PCREL:
214 return &elf_howto_table[(int) R_390_GOT32];
215 case BFD_RELOC_390_PLT32:
216 return &elf_howto_table[(int) R_390_PLT32];
217 case BFD_RELOC_390_COPY:
218 return &elf_howto_table[(int) R_390_COPY];
219 case BFD_RELOC_390_GLOB_DAT:
220 return &elf_howto_table[(int) R_390_GLOB_DAT];
221 case BFD_RELOC_390_JMP_SLOT:
222 return &elf_howto_table[(int) R_390_JMP_SLOT];
223 case BFD_RELOC_390_RELATIVE:
224 return &elf_howto_table[(int) R_390_RELATIVE];
225 case BFD_RELOC_32_GOTOFF:
5236c819 226 return &elf_howto_table[(int) R_390_GOTOFF32];
0451c93c
MS		 227 case BFD_RELOC_390_GOTPC:
228 return &elf_howto_table[(int) R_390_GOTPC];
229 case BFD_RELOC_390_GOT16:
230 return &elf_howto_table[(int) R_390_GOT16];
231 case BFD_RELOC_16_PCREL:
232 return &elf_howto_table[(int) R_390_PC16];
fb798c50
AK		 233 case BFD_RELOC_390_PC12DBL:
234 return &elf_howto_table[(int) R_390_PC12DBL];
235 case BFD_RELOC_390_PLT12DBL:
236 return &elf_howto_table[(int) R_390_PLT12DBL];
0451c93c
MS		 237 case BFD_RELOC_390_PC16DBL:
238 return &elf_howto_table[(int) R_390_PC16DBL];
239 case BFD_RELOC_390_PLT16DBL:
240 return &elf_howto_table[(int) R_390_PLT16DBL];
fb798c50
AK		 241 case BFD_RELOC_390_PC24DBL:
242 return &elf_howto_table[(int) R_390_PC24DBL];
243 case BFD_RELOC_390_PLT24DBL:
244 return &elf_howto_table[(int) R_390_PLT24DBL];
0451c93c
MS		 245 case BFD_RELOC_390_PC32DBL:
246 return &elf_howto_table[(int) R_390_PC32DBL];
247 case BFD_RELOC_390_PLT32DBL:
248 return &elf_howto_table[(int) R_390_PLT32DBL];
249 case BFD_RELOC_390_GOTPCDBL:
250 return &elf_howto_table[(int) R_390_GOTPCDBL];
251 case BFD_RELOC_64:
252 return &elf_howto_table[(int) R_390_64];
253 case BFD_RELOC_64_PCREL:
254 return &elf_howto_table[(int) R_390_PC64];
255 case BFD_RELOC_390_GOT64:
256 return &elf_howto_table[(int) R_390_GOT64];
257 case BFD_RELOC_390_PLT64:
258 return &elf_howto_table[(int) R_390_PLT64];
259 case BFD_RELOC_390_GOTENT:
260 return &elf_howto_table[(int) R_390_GOTENT];
5236c819
MS		 261 case BFD_RELOC_16_GOTOFF:
262 return &elf_howto_table[(int) R_390_GOTOFF16];
263 case BFD_RELOC_390_GOTOFF64:
264 return &elf_howto_table[(int) R_390_GOTOFF64];
265 case BFD_RELOC_390_GOTPLT12:
266 return &elf_howto_table[(int) R_390_GOTPLT12];
267 case BFD_RELOC_390_GOTPLT16:
268 return &elf_howto_table[(int) R_390_GOTPLT16];
269 case BFD_RELOC_390_GOTPLT32:
270 return &elf_howto_table[(int) R_390_GOTPLT32];
271 case BFD_RELOC_390_GOTPLT64:
272 return &elf_howto_table[(int) R_390_GOTPLT64];
273 case BFD_RELOC_390_GOTPLTENT:
274 return &elf_howto_table[(int) R_390_GOTPLTENT];
275 case BFD_RELOC_390_PLTOFF16:
276 return &elf_howto_table[(int) R_390_PLTOFF16];
277 case BFD_RELOC_390_PLTOFF32:
278 return &elf_howto_table[(int) R_390_PLTOFF32];
279 case BFD_RELOC_390_PLTOFF64:
280 return &elf_howto_table[(int) R_390_PLTOFF64];
69fc87f1
MS		 281 case BFD_RELOC_390_TLS_LOAD:
282 return &elf_howto_table[(int) R_390_TLS_LOAD];
283 case BFD_RELOC_390_TLS_GDCALL:
284 return &elf_howto_table[(int) R_390_TLS_GDCALL];
285 case BFD_RELOC_390_TLS_LDCALL:
286 return &elf_howto_table[(int) R_390_TLS_LDCALL];
287 case BFD_RELOC_390_TLS_GD64:
288 return &elf_howto_table[(int) R_390_TLS_GD64];
289 case BFD_RELOC_390_TLS_GOTIE12:
290 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
291 case BFD_RELOC_390_TLS_GOTIE64:
292 return &elf_howto_table[(int) R_390_TLS_GOTIE64];
293 case BFD_RELOC_390_TLS_LDM64:
294 return &elf_howto_table[(int) R_390_TLS_LDM64];
295 case BFD_RELOC_390_TLS_IE64:
296 return &elf_howto_table[(int) R_390_TLS_IE64];
297 case BFD_RELOC_390_TLS_IEENT:
298 return &elf_howto_table[(int) R_390_TLS_IEENT];
299 case BFD_RELOC_390_TLS_LE64:
300 return &elf_howto_table[(int) R_390_TLS_LE64];
301 case BFD_RELOC_390_TLS_LDO64:
302 return &elf_howto_table[(int) R_390_TLS_LDO64];
303 case BFD_RELOC_390_TLS_DTPMOD:
304 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
305 case BFD_RELOC_390_TLS_DTPOFF:
306 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
307 case BFD_RELOC_390_TLS_TPOFF:
308 return &elf_howto_table[(int) R_390_TLS_TPOFF];
bd1ea41b
MS		 309 case BFD_RELOC_390_20:
310 return &elf_howto_table[(int) R_390_20];
311 case BFD_RELOC_390_GOT20:
312 return &elf_howto_table[(int) R_390_GOT20];
313 case BFD_RELOC_390_GOTPLT20:
314 return &elf_howto_table[(int) R_390_GOTPLT20];
315 case BFD_RELOC_390_TLS_GOTIE20:
316 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
470b557a
AK		 317 case BFD_RELOC_390_IRELATIVE:
318 return &elf_howto_table[(int) R_390_IRELATIVE];
5236c819
MS		 319 case BFD_RELOC_VTABLE_INHERIT:
320 return &elf64_s390_vtinherit_howto;
321 case BFD_RELOC_VTABLE_ENTRY:
322 return &elf64_s390_vtentry_howto;
0451c93c
MS		 323 default:
324 break;
325 }
f3185997
NC		 326
327 /* xgettext:c-format */
e8f5af78 328 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, (int) code);
f3185997
NC		 329 bfd_set_error (bfd_error_bad_value);
330 return NULL;
a85d7ed0
NC		 331}
332
157090f7
AM		 333static reloc_howto_type *
334elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
335 const char *r_name)
336{
337 unsigned int i;
338
339 for (i = 0;
340 i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]);
341 i++)
342 if (elf_howto_table[i].name != NULL
343 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
344 return &elf_howto_table[i];
345
0bc7245a
JK		 346 if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0)
347 return &elf64_s390_vtinherit_howto;
348 if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0)
349 return &elf64_s390_vtentry_howto;
157090f7
AM		 350
351 return NULL;
352}
353
a85d7ed0
NC		 354/* We need to use ELF64_R_TYPE so we have our own copy of this function,
355 and elf64-s390.c has its own copy. */
356
0a1b45a2 357static bool
2c3fc389
NC		 358elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
359 arelent *cache_ptr,
360 Elf_Internal_Rela *dst)
a85d7ed0 361{
d0fb9a8d 362 unsigned int r_type = ELF64_R_TYPE(dst->r_info);
f3185997 363
d0fb9a8d 364 switch (r_type)
a85d7ed0
NC		 365 {
366 case R_390_GNU_VTINHERIT:
367 cache_ptr->howto = &elf64_s390_vtinherit_howto;
368 break;
369
370 case R_390_GNU_VTENTRY:
371 cache_ptr->howto = &elf64_s390_vtentry_howto;
372 break;
373
374 default:
d0fb9a8d
JJ		 375 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
376 {
695344c0 377 /* xgettext:c-format */
0aa13fee
AM		 378 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
379 abfd, r_type);
f3185997 380 bfd_set_error (bfd_error_bad_value);
0a1b45a2 381 return false;
d0fb9a8d
JJ		 382 }
383 cache_ptr->howto = &elf_howto_table[r_type];
99c79b2e 384 }
0a1b45a2 385 return true;
a85d7ed0
NC		 386}
387
69fc87f1
MS		 388/* A relocation function which doesn't do anything. */
389static bfd_reloc_status_type
2c3fc389
NC		 390s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
391 arelent *reloc_entry,
392 asymbol *symbol ATTRIBUTE_UNUSED,
393 void * data ATTRIBUTE_UNUSED,
394 asection *input_section,
395 bfd *output_bfd,
396 char **error_message ATTRIBUTE_UNUSED)
69fc87f1
MS		 397{
398 if (output_bfd)
399 reloc_entry->address += input_section->output_offset;
400 return bfd_reloc_ok;
401}
402
bd1ea41b
MS		 403/* Handle the large displacement relocs. */
404static bfd_reloc_status_type
2c3fc389
NC		 405s390_elf_ldisp_reloc (bfd *abfd,
406 arelent *reloc_entry,
407 asymbol *symbol,
408 void * data,
409 asection *input_section,
410 bfd *output_bfd,
411 char **error_message ATTRIBUTE_UNUSED)
bd1ea41b
MS		 412{
413 reloc_howto_type *howto = reloc_entry->howto;
414 bfd_vma relocation;
415 bfd_vma insn;
416
417 if (output_bfd != (bfd *) NULL
418 && (symbol->flags & BSF_SECTION_SYM) == 0
419 && (! howto->partial_inplace
420 || reloc_entry->addend == 0))
421 {
422 reloc_entry->address += input_section->output_offset;
423 return bfd_reloc_ok;
424 }
425 if (output_bfd != NULL)
426 return bfd_reloc_continue;
427
07515404 428 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
bd1ea41b
MS		 429 return bfd_reloc_outofrange;
430
431 relocation = (symbol->value
432 + symbol->section->output_section->vma
433 + symbol->section->output_offset);
434 relocation += reloc_entry->addend;
435 if (howto->pc_relative)
436 {
437 relocation -= (input_section->output_section->vma
438 + input_section->output_offset);
439 relocation -= reloc_entry->address;
440 }
441
68ffbac6 442 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
bd1ea41b
MS		 443 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
444 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
445
446 if ((bfd_signed_vma) relocation < - 0x80000
447 || (bfd_signed_vma) relocation > 0x7ffff)
448 return bfd_reloc_overflow;
449 else
450 return bfd_reloc_ok;
451}
452
0a1b45a2 453static bool
2c3fc389 454elf_s390_is_local_label_name (bfd *abfd, const char *name)
a85d7ed0
NC		 455{
456 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
0a1b45a2 457 return true;
a85d7ed0
NC		 458
459 return _bfd_elf_is_local_label_name (abfd, name);
460}
461
462/* Functions for the 390 ELF linker. */
463
464/* The name of the dynamic interpreter. This is put in the .interp
465 section. */
466
87049b0d 467#define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
a85d7ed0 468
64285810
MS		 469/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
470 copying dynamic variables from a shared lib into an app's dynbss
471 section, and instead use a dynamic relocation to point into the
472 shared lib. */
473#define ELIMINATE_COPY_RELOCS 1
474
a85d7ed0
NC		 475/* The size in bytes of the first entry in the procedure linkage table. */
476#define PLT_FIRST_ENTRY_SIZE 32
477/* The size in bytes of an entry in the procedure linkage table. */
99c79b2e 478#define PLT_ENTRY_SIZE 32
a85d7ed0
NC		 479
480#define GOT_ENTRY_SIZE 8
481
470b557a
AK		 482#define RELA_ENTRY_SIZE sizeof (Elf64_External_Rela)
483
afca762f 484/* The first three entries in a global offset table are reserved,
a85d7ed0
NC		 485 and the initial contents are unimportant (we zero them out).
486 Subsequent entries look like this. See the SVR4 ABI 386
487 supplement to see how this works. */
488
489/* For the s390, simple addr offset can only be 0 - 4096.
490 To use the full 16777216 TB address space, several instructions
491 are needed to load an address in a register and execute
492 a branch( or just saving the address)
493
99c79b2e 494 Furthermore, only r 0 and 1 are free to use!!! */
a85d7ed0
NC		 495
496/* The first 3 words in the GOT are then reserved.
497 Word 0 is the address of the dynamic table.
498 Word 1 is a pointer to a structure describing the object
499 Word 2 is used to point to the loader entry address.
500
501 The code for PLT entries looks like this:
502
503 The GOT holds the address in the PLT to be executed.
504 The loader then gets:
3b67f094
MK		 505 48(15) = Pointer to the structure describing the object.
506 56(15) = Offset in symbol table
a85d7ed0
NC		 507 The loader must then find the module where the function is
508 and insert the address in the GOT.
509
510 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
07d6d2b8
AM		 511 LG 1,0(1) # 6 bytes Load address from GOT in r1
512 BCR 15,1 # 2 bytes Jump to address
513 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
afca762f
AK		 514 LGF 1,12(1) # 6 bytes Load rela.plt offset into r1
515 BRCL 15,-x # 6 bytes Jump to first PLT entry
07d6d2b8 516 .long ? # 4 bytes offset into .rela.plt
a85d7ed0
NC		 517
518 Total = 32 bytes per PLT entry
519 Fixup at offset 2: relative address to GOT entry
520 Fixup at offset 22: relative branch to PLT0
a7e28bbe 521 Fixup at offset 28: 32 bit offset into .rela.plt
a85d7ed0 522
a7e28bbe
AK		 523 A 32 bit offset into the symbol table is enough. It allows for
524 .rela.plt sections up to a size of 2 gigabyte. A single dynamic
525 object (the main program, any shared library) is limited to 4GB in
526 size. Having a .rela.plt of 2GB would already make the .plt
527 section bigger than 8GB. */
a85d7ed0 528
9aa17453
AK		 529static const bfd_byte elf_s390x_plt_entry[PLT_ENTRY_SIZE] =
530 {
07d6d2b8
AM		 531 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
532 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */
533 0x07, 0xf1, /* br %r1 */
534 0x0d, 0x10, /* basr %r1,%r0 */
535 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */
536 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */
537 0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */
9aa17453 538 };
a85d7ed0
NC		 539
540/* The first PLT entry pushes the offset into the symbol table
a7e28bbe
AK		 541 from R1 onto the stack at 56(15) and the loader object info
542 at 48(15), loads the loader address in R1 and jumps to it. */
a85d7ed0
NC		 543
544/* The first entry in the PLT:
545
546 PLT0:
547 STG 1,56(15) # r1 contains the offset into the symbol table
548 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
549 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
550 LG 1,16(1) # get entry address of loader
551 BCR 15,1 # jump to loader
552
553 Fixup at offset 8: relative address to start of GOT. */
554
9aa17453
AK		 555static const bfd_byte elf_s390x_first_plt_entry[PLT_FIRST_ENTRY_SIZE] =
556 {
07d6d2b8
AM		 557 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */
558 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
559 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */
560 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */
561 0x07, 0xf1, /* br %r1 */
562 0x07, 0x00, /* nopr %r0 */
563 0x07, 0x00, /* nopr %r0 */
564 0x07, 0x00 /* nopr %r0 */
9aa17453 565 };
a85d7ed0 566
a85d7ed0
NC		 567
568/* s390 ELF linker hash entry. */
569
570struct elf_s390_link_hash_entry
571{
0451c93c 572 struct elf_link_hash_entry elf;
a85d7ed0 573
5236c819
MS		 574 /* Number of GOTPLT references for a function. */
575 bfd_signed_vma gotplt_refcount;
69fc87f1
MS		 576
577#define GOT_UNKNOWN 0
578#define GOT_NORMAL 1
579#define GOT_TLS_GD 2
580#define GOT_TLS_IE 3
581#define GOT_TLS_IE_NLT 3
582 unsigned char tls_type;
470b557a
AK		 583
584 /* For pointer equality reasons we might need to change the symbol
585 type from STT_GNU_IFUNC to STT_FUNC together with its value and
586 section entry. So after alloc_dynrelocs only these values should
587 be used. In order to check whether a symbol is IFUNC use
588 s390_is_ifunc_symbol_p. */
589 bfd_vma ifunc_resolver_address;
590 asection *ifunc_resolver_section;
a85d7ed0
NC		 591};
592
69fc87f1
MS		 593#define elf_s390_hash_entry(ent) \
594 ((struct elf_s390_link_hash_entry *)(ent))
595
470b557a
AK		 596/* This structure represents an entry in the local PLT list needed for
597 local IFUNC symbols. */
598struct plt_entry
599{
600 /* The section of the local symbol.
601 Set in relocate_section and used in finish_dynamic_sections. */
602 asection *sec;
603
604 union
605 {
606 bfd_signed_vma refcount;
607 bfd_vma offset;
608 } plt;
609};
610
0ffa91dd
NC		 611/* NOTE: Keep this structure in sync with
612 the one declared in elf32-s390.c. */
69fc87f1
MS		 613struct elf_s390_obj_tdata
614{
615 struct elf_obj_tdata root;
616
470b557a
AK		 617 /* A local PLT is needed for ifunc symbols. */
618 struct plt_entry *local_plt;
619
0ffa91dd 620 /* TLS type for each local got entry. */
69fc87f1
MS		 621 char *local_got_tls_type;
622};
623
624#define elf_s390_tdata(abfd) \
625 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
626
470b557a
AK		 627#define elf_s390_local_plt(abfd) \
628 (elf_s390_tdata (abfd)->local_plt)
629
69fc87f1
MS		 630#define elf_s390_local_got_tls_type(abfd) \
631 (elf_s390_tdata (abfd)->local_got_tls_type)
632
0ffa91dd
NC		 633#define is_s390_elf(bfd) \
634 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
635 && elf_tdata (bfd) != NULL \
4dfe6ac6 636 && elf_object_id (bfd) == S390_ELF_DATA)
0ffa91dd 637
0a1b45a2 638static bool
62d7a5f6 639elf_s390_mkobject (bfd *abfd)
69fc87f1 640{
0ffa91dd 641 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
4dfe6ac6 642 S390_ELF_DATA);
69fc87f1
MS		 643}
644
0a1b45a2 645static bool
2c3fc389 646elf_s390_object_p (bfd *abfd)
69fc87f1 647{
69fc87f1
MS		 648 /* Set the right machine number for an s390 elf32 file. */
649 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
650}
651
a85d7ed0
NC		 652/* s390 ELF linker hash table. */
653
654struct elf_s390_link_hash_table
655{
0451c93c 656 struct elf_link_hash_table elf;
a85d7ed0 657
0451c93c 658 /* Short-cuts to get to dynamic linker sections. */
470b557a 659 asection *irelifunc;
ec338859 660
69fc87f1
MS		 661 union {
662 bfd_signed_vma refcount;
663 bfd_vma offset;
664 } tls_ldm_got;
665
b4cbbe8f
AK		 666 /* Options passed from the linker. */
667 struct s390_elf_params *params;
0451c93c 668};
a85d7ed0
NC		 669
670/* Get the s390 ELF linker hash table from a link_info structure. */
671
ceada896 672#define elf_s390_hash_table(p) \
0f55320b
AM		 673 ((is_elf_hash_table ((p)->hash) \
674 && elf_hash_table_id (elf_hash_table (p)) == S390_ELF_DATA) \
675 ? (struct elf_s390_link_hash_table *) (p)->hash : NULL)
a85d7ed0 676
470b557a
AK		 677#define ELF64 1
678#include "elf-s390-common.c"
679
a85d7ed0
NC		 680/* Create an entry in an s390 ELF linker hash table. */
681
682static struct bfd_hash_entry *
2c3fc389
NC		 683link_hash_newfunc (struct bfd_hash_entry *entry,
684 struct bfd_hash_table *table,
685 const char *string)
a85d7ed0 686{
a85d7ed0
NC		 687 /* Allocate the structure if it has not already been allocated by a
688 subclass. */
0451c93c
MS		 689 if (entry == NULL)
690 {
691 entry = bfd_hash_allocate (table,
692 sizeof (struct elf_s390_link_hash_entry));
693 if (entry == NULL)
694 return entry;
695 }
a85d7ed0
NC		 696
697 /* Call the allocation method of the superclass. */
0451c93c
MS		 698 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
699 if (entry != NULL)
a85d7ed0 700 {
0451c93c
MS		 701 struct elf_s390_link_hash_entry *eh;
702
703 eh = (struct elf_s390_link_hash_entry *) entry;
5236c819 704 eh->gotplt_refcount = 0;
69fc87f1 705 eh->tls_type = GOT_UNKNOWN;
470b557a
AK		 706 eh->ifunc_resolver_address = 0;
707 eh->ifunc_resolver_section = NULL;
a85d7ed0
NC		 708 }
709
0451c93c 710 return entry;
a85d7ed0
NC		 711}
712
713/* Create an s390 ELF linker hash table. */
714
715static struct bfd_link_hash_table *
2c3fc389 716elf_s390_link_hash_table_create (bfd *abfd)
a85d7ed0
NC		 717{
718 struct elf_s390_link_hash_table *ret;
986f0783 719 size_t amt = sizeof (struct elf_s390_link_hash_table);
a85d7ed0 720
7bf52ea2 721 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
0451c93c 722 if (ret == NULL)
a85d7ed0
NC		 723 return NULL;
724
66eb6687 725 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
4dfe6ac6
NC		 726 sizeof (struct elf_s390_link_hash_entry),
727 S390_ELF_DATA))
a85d7ed0 728 {
e2d34d7d 729 free (ret);
a85d7ed0
NC		 730 return NULL;
731 }
732
0451c93c
MS		 733 return &ret->elf.root;
734}
735
0451c93c
MS		 736/* Copy the extra info we tack onto an elf_link_hash_entry. */
737
738static void
2c3fc389
NC		 739elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
740 struct elf_link_hash_entry *dir,
741 struct elf_link_hash_entry *ind)
0451c93c
MS		 742{
743 struct elf_s390_link_hash_entry *edir, *eind;
744
745 edir = (struct elf_s390_link_hash_entry *) dir;
746 eind = (struct elf_s390_link_hash_entry *) ind;
747
69fc87f1
MS		 748 if (ind->root.type == bfd_link_hash_indirect
749 && dir->got.refcount <= 0)
750 {
751 edir->tls_type = eind->tls_type;
752 eind->tls_type = GOT_UNKNOWN;
753 }
754
64285810
MS		 755 if (ELIMINATE_COPY_RELOCS
756 && ind->root.type != bfd_link_hash_indirect
f5385ebf
AM		 757 && dir->dynamic_adjusted)
758 {
759 /* If called to transfer flags for a weakdef during processing
760 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
761 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
e81830c5
AM		 762 if (dir->versioned != versioned_hidden)
763 dir->ref_dynamic |= ind->ref_dynamic;
f5385ebf
AM		 764 dir->ref_regular |= ind->ref_regular;
765 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
766 dir->needs_plt |= ind->needs_plt;
767 }
64285810 768 else
fcfa13d2 769 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
0451c93c 770}
a85d7ed0 771
69fc87f1 772static int
2c3fc389
NC		 773elf_s390_tls_transition (struct bfd_link_info *info,
774 int r_type,
775 int is_local)
69fc87f1 776{
26b14265 777 if (bfd_link_dll (info))
69fc87f1
MS		 778 return r_type;
779
780 switch (r_type)
781 {
782 case R_390_TLS_GD64:
783 case R_390_TLS_IE64:
784 if (is_local)
785 return R_390_TLS_LE64;
786 return R_390_TLS_IE64;
787 case R_390_TLS_GOTIE64:
788 if (is_local)
789 return R_390_TLS_LE64;
790 return R_390_TLS_GOTIE64;
791 case R_390_TLS_LDM64:
792 return R_390_TLS_LE64;
793 }
794
795 return r_type;
796}
797
a85d7ed0
NC		 798/* Look through the relocs for a section during the first phase, and
799 allocate space in the global offset table or procedure linkage
800 table. */
801
0a1b45a2 802static bool
4dfe6ac6
NC		 803elf_s390_check_relocs (bfd *abfd,
804 struct bfd_link_info *info,
805 asection *sec,
806 const Elf_Internal_Rela *relocs)
a85d7ed0 807{
0451c93c 808 struct elf_s390_link_hash_table *htab;
a85d7ed0
NC		 809 Elf_Internal_Shdr *symtab_hdr;
810 struct elf_link_hash_entry **sym_hashes;
a85d7ed0
NC		 811 const Elf_Internal_Rela *rel;
812 const Elf_Internal_Rela *rel_end;
a85d7ed0 813 asection *sreloc;
5236c819 814 bfd_signed_vma *local_got_refcounts;
69fc87f1 815 int tls_type, old_tls_type;
a85d7ed0 816
0e1862bb 817 if (bfd_link_relocatable (info))
0a1b45a2 818 return true;
a85d7ed0 819
0ffa91dd
NC		 820 BFD_ASSERT (is_s390_elf (abfd));
821
0451c93c 822 htab = elf_s390_hash_table (info);
4dfe6ac6 823 if (htab == NULL)
0a1b45a2 824 return false;
4dfe6ac6 825
0ffa91dd 826 symtab_hdr = &elf_symtab_hdr (abfd);
a85d7ed0 827 sym_hashes = elf_sym_hashes (abfd);
5236c819 828 local_got_refcounts = elf_local_got_refcounts (abfd);
a85d7ed0 829
a85d7ed0
NC		 830 sreloc = NULL;
831
832 rel_end = relocs + sec->reloc_count;
833 for (rel = relocs; rel < rel_end; rel++)
834 {
69fc87f1 835 unsigned int r_type;
d42c267e 836 unsigned int r_symndx;
a85d7ed0 837 struct elf_link_hash_entry *h;
470b557a 838 Elf_Internal_Sym *isym;
a85d7ed0
NC		 839
840 r_symndx = ELF64_R_SYM (rel->r_info);
841
0451c93c
MS		 842 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
843 {
695344c0 844 /* xgettext:c-format */
871b3ab2 845 _bfd_error_handler (_("%pB: bad symbol index: %d"),
4eca0228 846 abfd, r_symndx);
0a1b45a2 847 return false;
0451c93c
MS		 848 }
849
a85d7ed0 850 if (r_symndx < symtab_hdr->sh_info)
470b557a
AK		 851 {
852 /* A local symbol. */
f1dfbfdb 853 isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache,
470b557a
AK		 854 abfd, r_symndx);
855 if (isym == NULL)
0a1b45a2 856 return false;
470b557a
AK		 857
858 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
859 {
860 struct plt_entry *plt;
861
0cb79d69
AK		 862 if (htab->elf.dynobj == NULL)
863 htab->elf.dynobj = abfd;
864
470b557a 865 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
0a1b45a2 866 return false;
470b557a
AK		 867
868 if (local_got_refcounts == NULL)
869 {
870 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
0a1b45a2 871 return false;
470b557a
AK		 872 local_got_refcounts = elf_local_got_refcounts (abfd);
873 }
874 plt = elf_s390_local_plt (abfd);
875 plt[r_symndx].plt.refcount++;
876 }
877 h = NULL;
878 }
a85d7ed0 879 else
973a3492
L		 880 {
881 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
882 while (h->root.type == bfd_link_hash_indirect
883 || h->root.type == bfd_link_hash_warning)
884 h = (struct elf_link_hash_entry *) h->root.u.i.link;
885 }
a85d7ed0 886
5236c819
MS		 887 /* Create got section and local_got_refcounts array if they
888 are needed. */
69fc87f1
MS		 889 r_type = elf_s390_tls_transition (info,
890 ELF64_R_TYPE (rel->r_info),
891 h == NULL);
892 switch (r_type)
a85d7ed0
NC		 893 {
894 case R_390_GOT12:
947216bf 895 case R_390_GOT16:
bd1ea41b 896 case R_390_GOT20:
a85d7ed0
NC		 897 case R_390_GOT32:
898 case R_390_GOT64:
899 case R_390_GOTENT:
5236c819
MS		 900 case R_390_GOTPLT12:
901 case R_390_GOTPLT16:
bd1ea41b 902 case R_390_GOTPLT20:
5236c819
MS		 903 case R_390_GOTPLT32:
904 case R_390_GOTPLT64:
905 case R_390_GOTPLTENT:
69fc87f1
MS		 906 case R_390_TLS_GD64:
907 case R_390_TLS_GOTIE12:
bd1ea41b 908 case R_390_TLS_GOTIE20:
69fc87f1
MS		 909 case R_390_TLS_GOTIE64:
910 case R_390_TLS_IEENT:
911 case R_390_TLS_IE64:
912 case R_390_TLS_LDM64:
5236c819
MS		 913 if (h == NULL
914 && local_got_refcounts == NULL)
a85d7ed0 915 {
470b557a 916 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
0a1b45a2 917 return false;
470b557a 918 local_got_refcounts = elf_local_got_refcounts (abfd);
a85d7ed0 919 }
470b557a 920
5236c819
MS		 921 /* Fall through. */
922 case R_390_GOTOFF16:
923 case R_390_GOTOFF32:
924 case R_390_GOTOFF64:
0451c93c
MS		 925 case R_390_GOTPC:
926 case R_390_GOTPCDBL:
f41345a7 927 if (htab->elf.sgot == NULL)
0451c93c
MS		 928 {
929 if (htab->elf.dynobj == NULL)
930 htab->elf.dynobj = abfd;
ce558b89 931 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
0a1b45a2 932 return false;
0451c93c 933 }
5236c819
MS		 934 }
935
470b557a
AK		 936 if (h != NULL)
937 {
938 if (htab->elf.dynobj == NULL)
939 htab->elf.dynobj = abfd;
940 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
0a1b45a2 941 return false;
470b557a
AK		 942
943 /* Make sure an IFUNC symbol defined in a non-shared object
944 always gets a PLT slot. */
945 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
946 {
947 /* The symbol is called by the dynamic loader in order
948 to resolve the relocation. So it is in fact also
949 referenced. */
950 h->ref_regular = 1;
951 h->needs_plt = 1;
952 }
953 }
954
69fc87f1 955 switch (r_type)
5236c819 956 {
5236c819
MS		 957 case R_390_GOTPC:
958 case R_390_GOTPCDBL:
470b557a
AK		 959 /* These relocs do not need a GOT slot. They just load the
960 GOT pointer itself or address something else relative to
961 the GOT. Since the GOT pointer has been set up above we
962 are done. */
0451c93c 963 break;
d47b13e0
AK		 964 case R_390_GOTOFF16:
965 case R_390_GOTOFF32:
966 case R_390_GOTOFF64:
967 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
968 break;
1a0670f3 969 /* Fall through. */
ec338859 970
fb798c50 971 case R_390_PLT12DBL:
947216bf 972 case R_390_PLT16DBL:
fb798c50 973 case R_390_PLT24DBL:
a85d7ed0
NC		 974 case R_390_PLT32:
975 case R_390_PLT32DBL:
976 case R_390_PLT64:
5236c819
MS		 977 case R_390_PLTOFF16:
978 case R_390_PLTOFF32:
979 case R_390_PLTOFF64:
a85d7ed0 980 /* This symbol requires a procedure linkage table entry. We
947216bf
AM		 981 actually build the entry in adjust_dynamic_symbol,
982 because this might be a case of linking PIC code which is
983 never referenced by a dynamic object, in which case we
984 don't need to generate a procedure linkage table entry
985 after all. */
ec338859 986
a85d7ed0 987 /* If this is a local symbol, we resolve it directly without
947216bf 988 creating a procedure linkage table entry. */
5236c819
MS		 989 if (h != NULL)
990 {
f5385ebf 991 h->needs_plt = 1;
5236c819
MS		 992 h->plt.refcount += 1;
993 }
994 break;
ec338859 995
5236c819
MS		 996 case R_390_GOTPLT12:
997 case R_390_GOTPLT16:
bd1ea41b 998 case R_390_GOTPLT20:
5236c819
MS		 999 case R_390_GOTPLT32:
1000 case R_390_GOTPLT64:
1001 case R_390_GOTPLTENT:
1002 /* This symbol requires either a procedure linkage table entry
1003 or an entry in the local got. We actually build the entry
1004 in adjust_dynamic_symbol because whether this is really a
1005 global reference can change and with it the fact if we have
1006 to create a plt entry or a local got entry. To be able to
1007 make a once global symbol a local one we have to keep track
1008 of the number of gotplt references that exist for this
1009 symbol. */
1010 if (h != NULL)
1011 {
1012 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
f5385ebf 1013 h->needs_plt = 1;
5236c819
MS		 1014 h->plt.refcount += 1;
1015 }
69fc87f1
MS		 1016 else
1017 local_got_refcounts[r_symndx] += 1;
1018 break;
1019
1020 case R_390_TLS_LDM64:
1021 htab->tls_ldm_got.refcount += 1;
1022 break;
1023
1024 case R_390_TLS_IE64:
1025 case R_390_TLS_GOTIE12:
bd1ea41b 1026 case R_390_TLS_GOTIE20:
69fc87f1
MS		 1027 case R_390_TLS_GOTIE64:
1028 case R_390_TLS_IEENT:
26b14265 1029 if (bfd_link_dll (info))
69fc87f1
MS		 1030 info->flags |= DF_STATIC_TLS;
1031 /* Fall through */
1032
1033 case R_390_GOT12:
26e41594 1034 case R_390_GOT16:
bd1ea41b 1035 case R_390_GOT20:
69fc87f1
MS		 1036 case R_390_GOT32:
1037 case R_390_GOT64:
1038 case R_390_GOTENT:
1039 case R_390_TLS_GD64:
1040 /* This symbol requires a global offset table entry. */
1041 switch (r_type)
1042 {
1043 default:
1044 case R_390_GOT12:
1045 case R_390_GOT16:
bd1ea41b 1046 case R_390_GOT20:
69fc87f1
MS		 1047 case R_390_GOT32:
1048 case R_390_GOTENT:
1049 tls_type = GOT_NORMAL;
1050 break;
1051 case R_390_TLS_GD64:
1052 tls_type = GOT_TLS_GD;
1053 break;
1054 case R_390_TLS_IE64:
1055 case R_390_TLS_GOTIE64:
1056 tls_type = GOT_TLS_IE;
1057 break;
1058 case R_390_TLS_GOTIE12:
bd1ea41b 1059 case R_390_TLS_GOTIE20:
69fc87f1
MS		 1060 case R_390_TLS_IEENT:
1061 tls_type = GOT_TLS_IE_NLT;
1062 break;
1063 }
1064
1065 if (h != NULL)
1066 {
1067 h->got.refcount += 1;
1068 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1069 }
5236c819
MS		 1070 else
1071 {
1072 local_got_refcounts[r_symndx] += 1;
69fc87f1 1073 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
5236c819 1074 }
69fc87f1
MS		 1075 /* If a TLS symbol is accessed using IE at least once,
1076 there is no point to use dynamic model for it. */
1077 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1078 {
1079 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1080 {
4eca0228 1081 _bfd_error_handler
695344c0 1082 /* xgettext:c-format */
871b3ab2 1083 (_("%pB: `%s' accessed both as normal and thread local symbol"),
d003868e 1084 abfd, h->root.root.string);
0a1b45a2 1085 return false;
69fc87f1
MS		 1086 }
1087 if (old_tls_type > tls_type)
1088 tls_type = old_tls_type;
1089 }
1090
1091 if (old_tls_type != tls_type)
1092 {
1093 if (h != NULL)
1094 elf_s390_hash_entry (h)->tls_type = tls_type;
1095 else
1096 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1097 }
1098
1099 if (r_type != R_390_TLS_IE64)
1100 break;
1101 /* Fall through */
1102
1103 case R_390_TLS_LE64:
e00d879a
AK		 1104 /* For static linking and executables this reloc will be
1105 calculated at linktime otherwise a TLS_TPOFF runtime
1106 reloc will be generated. */
0e1862bb 1107 if (r_type == R_390_TLS_LE64 && bfd_link_pie (info))
e00d879a
AK		 1108 break;
1109
26b14265 1110 if (!bfd_link_dll (info))
69fc87f1
MS		 1111 break;
1112 info->flags |= DF_STATIC_TLS;
1113 /* Fall through */
ec338859 1114
947216bf
AM		 1115 case R_390_8:
1116 case R_390_16:
a85d7ed0
NC		 1117 case R_390_32:
1118 case R_390_64:
fb798c50 1119 case R_390_PC12DBL:
947216bf
AM		 1120 case R_390_PC16:
1121 case R_390_PC16DBL:
fb798c50 1122 case R_390_PC24DBL:
a85d7ed0
NC		 1123 case R_390_PC32:
1124 case R_390_PC32DBL:
1125 case R_390_PC64:
99ba5125 1126 if (h != NULL && bfd_link_executable (info))
0451c93c
MS		 1127 {
1128 /* If this reloc is in a read-only section, we might
1129 need a copy reloc. We can't check reliably at this
1130 stage whether the section is read-only, as input
1131 sections have not yet been mapped to output sections.
1132 Tentatively set the flag for now, and correct in
1133 adjust_dynamic_symbol. */
f5385ebf 1134 h->non_got_ref = 1;
ec338859 1135
0e1862bb 1136 if (!bfd_link_pic (info))
470b557a
AK		 1137 {
1138 /* We may need a .plt entry if the function this reloc
1139 refers to is in a shared lib. */
1140 h->plt.refcount += 1;
1141 }
0451c93c 1142 }
ec338859 1143
a85d7ed0 1144 /* If we are creating a shared library, and this is a reloc
0451c93c
MS		 1145 against a global symbol, or a non PC relative reloc
1146 against a local symbol, then we need to copy the reloc
1147 into the shared library. However, if we are linking with
1148 -Bsymbolic, we do not need to copy a reloc against a
1149 global symbol which is defined in an object we are
1150 including in the link (i.e., DEF_REGULAR is set). At
1151 this point we have not seen all the input files, so it is
1152 possible that DEF_REGULAR is not set now but will be set
1153 later (it is never cleared). In case of a weak definition,
1154 DEF_REGULAR may be cleared later by a strong definition in
1155 a shared library. We account for that possibility below by
1156 storing information in the relocs_copied field of the hash
1157 table entry. A similar situation occurs when creating
1158 shared libraries and symbol visibility changes render the
1159 symbol local.
1160
1161 If on the other hand, we are creating an executable, we
1162 may need to keep relocations for symbols satisfied by a
1163 dynamic library if we manage to avoid copy relocs for the
1164 symbol. */
0e1862bb 1165 if ((bfd_link_pic (info)
0451c93c
MS		 1166 && (sec->flags & SEC_ALLOC) != 0
1167 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
fb798c50 1168 && ELF64_R_TYPE (rel->r_info) != R_390_PC12DBL
0451c93c 1169 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
fb798c50 1170 && ELF64_R_TYPE (rel->r_info) != R_390_PC24DBL
0451c93c
MS		 1171 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1172 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1173 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1174 || (h != NULL
8c21ca21 1175 && (! SYMBOLIC_BIND (info, h)
0451c93c 1176 || h->root.type == bfd_link_hash_defweak
f5385ebf 1177 || !h->def_regular))))
64285810 1178 || (ELIMINATE_COPY_RELOCS
0e1862bb 1179 && !bfd_link_pic (info)
0451c93c
MS		 1180 && (sec->flags & SEC_ALLOC) != 0
1181 && h != NULL
1182 && (h->root.type == bfd_link_hash_defweak
f5385ebf 1183 || !h->def_regular)))
a85d7ed0 1184 {
00d8c7a9
AK		 1185 struct elf_dyn_relocs *p;
1186 struct elf_dyn_relocs **head;
ec338859 1187
0451c93c
MS		 1188 /* We must copy these reloc types into the output file.
1189 Create a reloc section in dynobj and make room for
1190 this reloc. */
a85d7ed0
NC		 1191 if (sreloc == NULL)
1192 {
440e9cd2
AK		 1193 if (htab->elf.dynobj == NULL)
1194 htab->elf.dynobj = abfd;
1195
83bac4b0 1196 sreloc = _bfd_elf_make_dynamic_reloc_section
0a1b45a2 1197 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ true);
ec338859 1198
a85d7ed0 1199 if (sreloc == NULL)
0a1b45a2 1200 return false;
a85d7ed0 1201 }
ec338859 1202
0451c93c
MS		 1203 /* If this is a global symbol, we count the number of
1204 relocations we need for this symbol. */
1205 if (h != NULL)
a85d7ed0 1206 {
190eb1dd 1207 head = &h->dyn_relocs;
0451c93c
MS		 1208 }
1209 else
1210 {
ec338859
AM		 1211 /* Track dynamic relocs needed for local syms too.
1212 We really need local syms available to do this
1213 easily. Oh well. */
ec338859 1214 asection *s;
6edfbbad
DJ		 1215 void *vpp;
1216
f1dfbfdb 1217 isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache,
87d72d41
AM		 1218 abfd, r_symndx);
1219 if (isym == NULL)
0a1b45a2 1220 return false;
ec338859 1221
87d72d41
AM		 1222 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1223 if (s == NULL)
1224 s = sec;
1225
6edfbbad 1226 vpp = &elf_section_data (s)->local_dynrel;
00d8c7a9 1227 head = (struct elf_dyn_relocs **) vpp;
ec338859
AM		 1228 }
1229
1230 p = *head;
1231 if (p == NULL || p->sec != sec)
1232 {
986f0783 1233 size_t amt = sizeof *p;
00d8c7a9 1234 p = ((struct elf_dyn_relocs *)
ec338859
AM		 1235 bfd_alloc (htab->elf.dynobj, amt));
1236 if (p == NULL)
0a1b45a2 1237 return false;
ec338859
AM		 1238 p->next = *head;
1239 *head = p;
1240 p->sec = sec;
1241 p->count = 0;
1242 p->pc_count = 0;
a85d7ed0 1243 }
ec338859
AM		 1244
1245 p->count += 1;
1246 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
fb798c50
AK		 1247 || ELF64_R_TYPE (rel->r_info) == R_390_PC12DBL
1248 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
ec338859
AM		 1249 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1250 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1251 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1252 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1253 p->pc_count += 1;
a85d7ed0 1254 }
a85d7ed0 1255 break;
ec338859 1256
a85d7ed0
NC		 1257 /* This relocation describes the C++ object vtable hierarchy.
1258 Reconstruct it for later use during GC. */
947216bf 1259 case R_390_GNU_VTINHERIT:
c152c796 1260 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
0a1b45a2 1261 return false;
947216bf 1262 break;
ec338859 1263
a85d7ed0
NC		 1264 /* This relocation describes which C++ vtable entries are actually
1265 used. Record for later use during GC. */
947216bf 1266 case R_390_GNU_VTENTRY:
a0ea3a14 1267 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
0a1b45a2 1268 return false;
947216bf 1269 break;
ec338859 1270
a85d7ed0
NC		 1271 default:
1272 break;
1273 }
1274 }
1275
0a1b45a2 1276 return true;
a85d7ed0
NC		 1277}
1278
1279/* Return the section that should be marked against GC for a given
1280 relocation. */
1281
1282static asection *
07adf181
AM		 1283elf_s390_gc_mark_hook (asection *sec,
1284 struct bfd_link_info *info,
1285 Elf_Internal_Rela *rel,
1286 struct elf_link_hash_entry *h,
1287 Elf_Internal_Sym *sym)
a85d7ed0
NC		 1288{
1289 if (h != NULL)
07adf181
AM		 1290 switch (ELF64_R_TYPE (rel->r_info))
1291 {
1292 case R_390_GNU_VTINHERIT:
1293 case R_390_GNU_VTENTRY:
1294 return NULL;
1295 }
1296
1297 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
a85d7ed0
NC		 1298}
1299
5236c819
MS		 1300/* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1301 entry but we found we will not create any. Called when we find we will
1302 not have any PLT for this symbol, by for example
1303 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1304 or elf_s390_size_dynamic_sections if no dynamic sections will be
1305 created (we're only linking static objects). */
1306
1307static void
2c3fc389 1308elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
5236c819
MS		 1309{
1310 if (h->elf.root.type == bfd_link_hash_warning)
1311 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1312
1313 if (h->gotplt_refcount <= 0)
1314 return;
1315
1316 /* We simply add the number of gotplt references to the number
1317 * of got references for this symbol. */
1318 h->elf.got.refcount += h->gotplt_refcount;
1319 h->gotplt_refcount = -1;
1320}
1321
a85d7ed0
NC		 1322/* Adjust a symbol defined by a dynamic object and referenced by a
1323 regular object. The current definition is in some section of the
1324 dynamic object, but we're not including those sections. We have to
1325 change the definition to something the rest of the link can
1326 understand. */
1327
0a1b45a2 1328static bool
4dfe6ac6
NC		 1329elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1330 struct elf_link_hash_entry *h)
a85d7ed0 1331{
0451c93c 1332 struct elf_s390_link_hash_table *htab;
5474d94f 1333 asection *s, *srel;
a85d7ed0 1334
470b557a
AK		 1335 /* STT_GNU_IFUNC symbol must go through PLT. */
1336 if (s390_is_ifunc_symbol_p (h))
d8ee9e44
AK		 1337 {
1338 /* All local STT_GNU_IFUNC references must be treated as local
1339 calls via local PLT. */
1340 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1341 {
1342 bfd_size_type pc_count = 0, count = 0;
1343 struct elf_dyn_relocs **pp;
d8ee9e44
AK		 1344 struct elf_dyn_relocs *p;
1345
190eb1dd 1346 for (pp = &h->dyn_relocs; (p = *pp) != NULL; )
d8ee9e44
AK		 1347 {
1348 pc_count += p->pc_count;
1349 p->count -= p->pc_count;
1350 p->pc_count = 0;
1351 count += p->count;
1352 if (p->count == 0)
1353 *pp = p->next;
1354 else
1355 pp = &p->next;
1356 }
1357
1358 if (pc_count || count)
1359 {
1360 h->needs_plt = 1;
1361 h->non_got_ref = 1;
1362 if (h->plt.refcount <= 0)
1363 h->plt.refcount = 1;
1364 else
1365 h->plt.refcount += 1;
1366 }
1367 }
1368
1369 if (h->plt.refcount <= 0)
1370 {
1371 h->plt.offset = (bfd_vma) -1;
1372 h->needs_plt = 0;
1373 }
0a1b45a2 1374 return true;
d8ee9e44 1375 }
470b557a 1376
a85d7ed0
NC		 1377 /* If this is a function, put it in the procedure linkage table. We
1378 will fill in the contents of the procedure linkage table later
cedb70c5 1379 (although we could actually do it here). */
a85d7ed0 1380 if (h->type == STT_FUNC
f5385ebf 1381 || h->needs_plt)
a85d7ed0 1382 {
0451c93c 1383 if (h->plt.refcount <= 0
8c21ca21 1384 || SYMBOL_CALLS_LOCAL (info, h)
10e7c045 1385 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
a85d7ed0
NC		 1386 {
1387 /* This case can occur if we saw a PLT32 reloc in an input
947216bf
AM		 1388 file, but the symbol was never referred to by a dynamic
1389 object, or if all references were garbage collected. In
0451c93c
MS		 1390 such a case, we don't actually need to build a procedure
1391 linkage table, and we can just do a PC32 reloc instead. */
a85d7ed0 1392 h->plt.offset = (bfd_vma) -1;
f5385ebf 1393 h->needs_plt = 0;
5236c819 1394 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
a85d7ed0
NC		 1395 }
1396
0a1b45a2 1397 return true;
a85d7ed0 1398 }
bbd7ec4a 1399 else
0451c93c
MS		 1400 /* It's possible that we incorrectly decided a .plt reloc was
1401 needed for an R_390_PC32 reloc to a non-function sym in
1402 check_relocs. We can't decide accurately between function and
1403 non-function syms in check-relocs; Objects loaded later in
1404 the link may change h->type. So fix it now. */
bbd7ec4a 1405 h->plt.offset = (bfd_vma) -1;
a85d7ed0
NC		 1406
1407 /* If this is a weak symbol, and there is a real definition, the
1408 processor independent code will have arranged for us to see the
1409 real definition first, and we can just use the same value. */
60d67dc8 1410 if (h->is_weakalias)
a85d7ed0 1411 {
60d67dc8
AM		 1412 struct elf_link_hash_entry *def = weakdef (h);
1413 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
1414 h->root.u.def.section = def->root.u.def.section;
1415 h->root.u.def.value = def->root.u.def.value;
64285810 1416 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
60d67dc8 1417 h->non_got_ref = def->non_got_ref;
0a1b45a2 1418 return true;
a85d7ed0
NC		 1419 }
1420
1421 /* This is a reference to a symbol defined by a dynamic object which
1422 is not a function. */
1423
1424 /* If we are creating a shared library, we must presume that the
1425 only references to the symbol are via the global offset table.
1426 For such cases we need not do anything here; the relocations will
1427 be handled correctly by relocate_section. */
0e1862bb 1428 if (bfd_link_pic (info))
0a1b45a2 1429 return true;
a85d7ed0
NC		 1430
1431 /* If there are no references to this symbol that do not use the
1432 GOT, we don't need to generate a copy reloc. */
f5385ebf 1433 if (!h->non_got_ref)
0a1b45a2 1434 return true;
a85d7ed0 1435
0451c93c
MS		 1436 /* If -z nocopyreloc was given, we won't generate them either. */
1437 if (info->nocopyreloc)
1438 {
f5385ebf 1439 h->non_got_ref = 0;
0a1b45a2 1440 return true;
0451c93c
MS		 1441 }
1442
3bf083ed
AM		 1443 /* If we don't find any dynamic relocs in read-only sections, then
1444 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
5dbc8b37 1445 if (ELIMINATE_COPY_RELOCS && !_bfd_elf_readonly_dynrelocs (h))
0451c93c 1446 {
3bf083ed 1447 h->non_got_ref = 0;
0a1b45a2 1448 return true;
0451c93c
MS		 1449 }
1450
a85d7ed0
NC		 1451 /* We must allocate the symbol in our .dynbss section, which will
1452 become part of the .bss section of the executable. There will be
1453 an entry for this symbol in the .dynsym section. The dynamic
1454 object will contain position independent code, so all references
1455 from the dynamic object to this symbol will go through the global
1456 offset table. The dynamic linker will use the .dynsym entry to
1457 determine the address it must put in the global offset table, so
1458 both the dynamic object and the regular object will refer to the
1459 same memory location for the variable. */
1460
0451c93c 1461 htab = elf_s390_hash_table (info);
4dfe6ac6 1462 if (htab == NULL)
0a1b45a2 1463 return false;
a85d7ed0 1464
0451c93c
MS		 1465 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1466 copy the initial value out of the dynamic object and into the
1467 runtime process image. */
5474d94f
AM		 1468 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1469 {
1470 s = htab->elf.sdynrelro;
1471 srel = htab->elf.sreldynrelro;
1472 }
1473 else
1474 {
1475 s = htab->elf.sdynbss;
1476 srel = htab->elf.srelbss;
1477 }
1d7e9d18 1478 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
a85d7ed0 1479 {
5474d94f 1480 srel->size += sizeof (Elf64_External_Rela);
f5385ebf 1481 h->needs_copy = 1;
a85d7ed0
NC		 1482 }
1483
6cabe1ea 1484 return _bfd_elf_adjust_dynamic_copy (info, h, s);
a85d7ed0
NC		 1485}
1486
0451c93c
MS		 1487/* Allocate space in .plt, .got and associated reloc sections for
1488 dynamic relocs. */
1489
0a1b45a2 1490static bool
4dfe6ac6
NC		 1491allocate_dynrelocs (struct elf_link_hash_entry *h,
1492 void * inf)
0451c93c
MS		 1493{
1494 struct bfd_link_info *info;
1495 struct elf_s390_link_hash_table *htab;
00d8c7a9 1496 struct elf_dyn_relocs *p;
0451c93c 1497
e92d460e 1498 if (h->root.type == bfd_link_hash_indirect)
0a1b45a2 1499 return true;
0451c93c
MS		 1500
1501 info = (struct bfd_link_info *) inf;
1502 htab = elf_s390_hash_table (info);
4dfe6ac6 1503 if (htab == NULL)
0a1b45a2 1504 return false;
0451c93c 1505
470b557a
AK		 1506 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1507 here if it is defined and referenced in a non-shared object. */
1508 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
61643fba 1509 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
470b557a
AK		 1510 else if (htab->elf.dynamic_sections_created
1511 && h->plt.refcount > 0)
0451c93c
MS		 1512 {
1513 /* Make sure this symbol is output as a dynamic symbol.
1514 Undefined weak syms won't yet be marked as dynamic. */
1515 if (h->dynindx == -1
f5385ebf 1516 && !h->forced_local)
0451c93c 1517 {
c152c796 1518 if (! bfd_elf_link_record_dynamic_symbol (info, h))
0a1b45a2 1519 return false;
0451c93c
MS		 1520 }
1521
0e1862bb 1522 if (bfd_link_pic (info)
4ec72bde 1523 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
0451c93c 1524 {
f41345a7 1525 asection *s = htab->elf.splt;
0451c93c
MS		 1526
1527 /* If this is the first .plt entry, make room for the special
1528 first entry. */
eea6121a
AM		 1529 if (s->size == 0)
1530 s->size += PLT_FIRST_ENTRY_SIZE;
0451c93c 1531
eea6121a 1532 h->plt.offset = s->size;
0451c93c
MS		 1533
1534 /* If this symbol is not defined in a regular file, and we are
1535 not generating a shared library, then set the symbol to this
1536 location in the .plt. This is required to make function
1537 pointers compare as equal between the normal executable and
1538 the shared library. */
0e1862bb 1539 if (! bfd_link_pic (info)
f5385ebf 1540 && !h->def_regular)
0451c93c
MS		 1541 {
1542 h->root.u.def.section = s;
1543 h->root.u.def.value = h->plt.offset;
1544 }
ec338859 1545
0451c93c 1546 /* Make room for this entry. */
eea6121a 1547 s->size += PLT_ENTRY_SIZE;
ec338859 1548
afca762f 1549 /* We also need to make an entry in the .got.plt section. */
f41345a7 1550 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
0451c93c
MS		 1551
1552 /* We also need to make an entry in the .rela.plt section. */
f41345a7 1553 htab->elf.srelplt->size += sizeof (Elf64_External_Rela);
0451c93c
MS		 1554 }
1555 else
1556 {
1557 h->plt.offset = (bfd_vma) -1;
f5385ebf 1558 h->needs_plt = 0;
5236c819 1559 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
0451c93c
MS		 1560 }
1561 }
1562 else
1563 {
1564 h->plt.offset = (bfd_vma) -1;
f5385ebf 1565 h->needs_plt = 0;
5236c819 1566 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
0451c93c
MS		 1567 }
1568
69fc87f1
MS		 1569 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1570 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1571 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1572 we can save the dynamic TLS relocation. */
1573 if (h->got.refcount > 0
26b14265 1574 && !bfd_link_dll (info)
69fc87f1
MS		 1575 && h->dynindx == -1
1576 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1577 {
1578 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1579 /* For the GOTIE access without a literal pool entry the offset has
1580 to be stored somewhere. The immediate value in the instruction
1581 is not bit enough so the value is stored in the got. */
1582 {
f41345a7
AK		 1583 h->got.offset = htab->elf.sgot->size;
1584 htab->elf.sgot->size += GOT_ENTRY_SIZE;
69fc87f1
MS		 1585 }
1586 else
1587 h->got.offset = (bfd_vma) -1;
1588 }
1589 else if (h->got.refcount > 0)
0451c93c
MS		 1590 {
1591 asection *s;
0a1b45a2 1592 bool dyn;
69fc87f1 1593 int tls_type = elf_s390_hash_entry(h)->tls_type;
0451c93c
MS		 1594
1595 /* Make sure this symbol is output as a dynamic symbol.
1596 Undefined weak syms won't yet be marked as dynamic. */
1597 if (h->dynindx == -1
f5385ebf 1598 && !h->forced_local)
0451c93c 1599 {
c152c796 1600 if (! bfd_elf_link_record_dynamic_symbol (info, h))
0a1b45a2 1601 return false;
0451c93c
MS		 1602 }
1603
f41345a7 1604 s = htab->elf.sgot;
eea6121a
AM		 1605 h->got.offset = s->size;
1606 s->size += GOT_ENTRY_SIZE;
69fc87f1
MS		 1607 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1608 if (tls_type == GOT_TLS_GD)
eea6121a 1609 s->size += GOT_ENTRY_SIZE;
0451c93c 1610 dyn = htab->elf.dynamic_sections_created;
69fc87f1
MS		 1611 /* R_390_TLS_IE64 needs one dynamic relocation,
1612 R_390_TLS_GD64 needs one if local symbol and two if global. */
1613 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1614 || tls_type >= GOT_TLS_IE)
f41345a7 1615 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
69fc87f1 1616 else if (tls_type == GOT_TLS_GD)
f41345a7 1617 htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela);
10e7c045 1618 else if (!UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)
0e1862bb 1619 && (bfd_link_pic (info)
82058a73 1620 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
f41345a7 1621 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
0451c93c
MS		 1622 }
1623 else
1624 h->got.offset = (bfd_vma) -1;
1625
190eb1dd 1626 if (h->dyn_relocs == NULL)
0a1b45a2 1627 return true;
0451c93c
MS		 1628
1629 /* In the shared -Bsymbolic case, discard space allocated for
1630 dynamic pc-relative relocs against symbols which turn out to be
1631 defined in regular objects. For the normal shared case, discard
1632 space for pc-relative relocs that have become local due to symbol
1633 visibility changes. */
1634
0e1862bb 1635 if (bfd_link_pic (info))
0451c93c 1636 {
8c21ca21 1637 if (SYMBOL_CALLS_LOCAL (info, h))
0451c93c 1638 {
00d8c7a9 1639 struct elf_dyn_relocs **pp;
0451c93c 1640
190eb1dd 1641 for (pp = &h->dyn_relocs; (p = *pp) != NULL; )
0451c93c
MS		 1642 {
1643 p->count -= p->pc_count;
1644 p->pc_count = 0;
1645 if (p->count == 0)
1646 *pp = p->next;
1647 else
1648 pp = &p->next;
1649 }
1650 }
82058a73
MS		 1651
1652 /* Also discard relocs on undefined weak syms with non-default
1653 visibility. */
190eb1dd 1654 if (h->dyn_relocs != NULL
82058a73 1655 && h->root.type == bfd_link_hash_undefweak)
22d606e9 1656 {
b27bb18f
L		 1657 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1658 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
190eb1dd 1659 h->dyn_relocs = NULL;
22d606e9
AM		 1660
1661 /* Make sure undefined weak symbols are output as a dynamic
1662 symbol in PIEs. */
1663 else if (h->dynindx == -1
1664 && !h->forced_local)
1665 {
1666 if (! bfd_elf_link_record_dynamic_symbol (info, h))
0a1b45a2 1667 return false;
22d606e9
AM		 1668 }
1669 }
0451c93c 1670 }
64285810 1671 else if (ELIMINATE_COPY_RELOCS)
0451c93c
MS		 1672 {
1673 /* For the non-shared case, discard space for relocs against
1674 symbols which turn out to need copy relocs or are not
1675 dynamic. */
1676
f5385ebf
AM		 1677 if (!h->non_got_ref
1678 && ((h->def_dynamic
1679 && !h->def_regular)
0451c93c
MS		 1680 || (htab->elf.dynamic_sections_created
1681 && (h->root.type == bfd_link_hash_undefweak
1682 || h->root.type == bfd_link_hash_undefined))))
1683 {
1684 /* Make sure this symbol is output as a dynamic symbol.
1685 Undefined weak syms won't yet be marked as dynamic. */
1686 if (h->dynindx == -1
f5385ebf 1687 && !h->forced_local)
0451c93c 1688 {
c152c796 1689 if (! bfd_elf_link_record_dynamic_symbol (info, h))
0a1b45a2 1690 return false;
0451c93c
MS		 1691 }
1692
1693 /* If that succeeded, we know we'll be keeping all the
1694 relocs. */
1695 if (h->dynindx != -1)
1696 goto keep;
1697 }
1698
190eb1dd 1699 h->dyn_relocs = NULL;
0451c93c 1700
ec338859 1701 keep: ;
0451c93c
MS		 1702 }
1703
1704 /* Finally, allocate space. */
190eb1dd 1705 for (p = h->dyn_relocs; p != NULL; p = p->next)
0451c93c
MS		 1706 {
1707 asection *sreloc = elf_section_data (p->sec)->sreloc;
eea6121a 1708 sreloc->size += p->count * sizeof (Elf64_External_Rela);
0451c93c
MS		 1709 }
1710
0a1b45a2 1711 return true;
0451c93c
MS		 1712}
1713
a85d7ed0
NC		 1714/* Set the sizes of the dynamic sections. */
1715
0a1b45a2 1716static bool
4dfe6ac6
NC		 1717elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1718 struct bfd_link_info *info)
a85d7ed0 1719{
0451c93c 1720 struct elf_s390_link_hash_table *htab;
a85d7ed0
NC		 1721 bfd *dynobj;
1722 asection *s;
0a1b45a2 1723 bool relocs;
0451c93c 1724 bfd *ibfd;
a85d7ed0 1725
0451c93c 1726 htab = elf_s390_hash_table (info);
4dfe6ac6 1727 if (htab == NULL)
0a1b45a2 1728 return false;
4dfe6ac6 1729
0451c93c
MS		 1730 dynobj = htab->elf.dynobj;
1731 if (dynobj == NULL)
1732 abort ();
a85d7ed0 1733
0451c93c 1734 if (htab->elf.dynamic_sections_created)
a85d7ed0
NC		 1735 {
1736 /* Set the contents of the .interp section to the interpreter. */
9b8b325a 1737 if (bfd_link_executable (info) && !info->nointerp)
a85d7ed0 1738 {
3d4d4302 1739 s = bfd_get_linker_section (dynobj, ".interp");
0451c93c
MS		 1740 if (s == NULL)
1741 abort ();
eea6121a 1742 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
a85d7ed0
NC		 1743 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1744 }
1745 }
a85d7ed0 1746
afca762f
AK		 1747 if (htab->elf.sgot && s390_gotplt_after_got_p (info))
1748 {
1749 /* _bfd_elf_create_got_section adds the got header size always
1750 to .got.plt but we need it in .got if this section comes
1751 first. */
1752 htab->elf.sgot->size += 3 * GOT_ENTRY_SIZE;
1753 htab->elf.sgotplt->size -= 3 * GOT_ENTRY_SIZE;
1754
1755 /* Make the _GLOBAL_OFFSET_TABLE_ symbol point to the .got
1756 instead of .got.plt. */
1757 htab->elf.hgot->root.u.def.section = htab->elf.sgot;
1758 htab->elf.hgot->root.u.def.value = 0;
1759 }
1760
0451c93c
MS		 1761 /* Set up .got offsets for local syms, and space for local dynamic
1762 relocs. */
c72f2fb2 1763 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
a85d7ed0 1764 {
0451c93c
MS		 1765 bfd_signed_vma *local_got;
1766 bfd_signed_vma *end_local_got;
69fc87f1 1767 char *local_tls_type;
0451c93c
MS		 1768 bfd_size_type locsymcount;
1769 Elf_Internal_Shdr *symtab_hdr;
1770 asection *srela;
470b557a
AK		 1771 struct plt_entry *local_plt;
1772 unsigned int i;
a85d7ed0 1773
0ffa91dd 1774 if (! is_s390_elf (ibfd))
a85d7ed0
NC		 1775 continue;
1776
0451c93c 1777 for (s = ibfd->sections; s != NULL; s = s->next)
a85d7ed0 1778 {
00d8c7a9 1779 struct elf_dyn_relocs *p;
0451c93c 1780
6edfbbad 1781 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
a85d7ed0 1782 {
ec338859
AM		 1783 if (!bfd_is_abs_section (p->sec)
1784 && bfd_is_abs_section (p->sec->output_section))
1785 {
1786 /* Input section has been discarded, either because
1787 it is a copy of a linkonce section or due to
1788 linker script /DISCARD/, so we'll be discarding
1789 the relocs too. */
1790 }
248866a8 1791 else if (p->count != 0)
ec338859
AM		 1792 {
1793 srela = elf_section_data (p->sec)->sreloc;
eea6121a 1794 srela->size += p->count * sizeof (Elf64_External_Rela);
248866a8
AM		 1795 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1796 info->flags |= DF_TEXTREL;
ec338859 1797 }
a85d7ed0
NC		 1798 }
1799 }
0451c93c
MS		 1800
1801 local_got = elf_local_got_refcounts (ibfd);
1802 if (!local_got)
1803 continue;
1804
0ffa91dd 1805 symtab_hdr = &elf_symtab_hdr (ibfd);
0451c93c
MS		 1806 locsymcount = symtab_hdr->sh_info;
1807 end_local_got = local_got + locsymcount;
69fc87f1 1808 local_tls_type = elf_s390_local_got_tls_type (ibfd);
f41345a7
AK		 1809 s = htab->elf.sgot;
1810 srela = htab->elf.srelgot;
69fc87f1 1811 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
a85d7ed0 1812 {
0451c93c 1813 if (*local_got > 0)
a85d7ed0 1814 {
eea6121a
AM		 1815 *local_got = s->size;
1816 s->size += GOT_ENTRY_SIZE;
69fc87f1 1817 if (*local_tls_type == GOT_TLS_GD)
eea6121a 1818 s->size += GOT_ENTRY_SIZE;
0e1862bb 1819 if (bfd_link_pic (info))
eea6121a 1820 srela->size += sizeof (Elf64_External_Rela);
a85d7ed0
NC		 1821 }
1822 else
0451c93c 1823 *local_got = (bfd_vma) -1;
a85d7ed0 1824 }
470b557a
AK		 1825
1826 local_plt = elf_s390_local_plt (ibfd);
1827 for (i = 0; i < symtab_hdr->sh_info; i++)
1828 {
1829 if (local_plt[i].plt.refcount > 0)
1830 {
1831 local_plt[i].plt.offset = htab->elf.iplt->size;
1832 htab->elf.iplt->size += PLT_ENTRY_SIZE;
1833 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
1834 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
1835 }
1836 else
1837 local_plt[i].plt.offset = (bfd_vma) -1;
1838 }
0451c93c
MS		 1839 }
1840
69fc87f1
MS		 1841 if (htab->tls_ldm_got.refcount > 0)
1842 {
1843 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
1844 relocs. */
f41345a7
AK		 1845 htab->tls_ldm_got.offset = htab->elf.sgot->size;
1846 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
1847 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
69fc87f1
MS		 1848 }
1849 else
1850 htab->tls_ldm_got.offset = -1;
1851
0451c93c
MS		 1852 /* Allocate global sym .plt and .got entries, and space for global
1853 sym dynamic relocs. */
2c3fc389 1854 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
0451c93c
MS		 1855
1856 /* We now have determined the sizes of the various dynamic sections.
1857 Allocate memory for them. */
0a1b45a2 1858 relocs = false;
0451c93c
MS		 1859 for (s = dynobj->sections; s != NULL; s = s->next)
1860 {
1861 if ((s->flags & SEC_LINKER_CREATED) == 0)
1862 continue;
1863
f41345a7
AK		 1864 if (s == htab->elf.splt
1865 || s == htab->elf.sgot
1866 || s == htab->elf.sgotplt
9d19e4fd 1867 || s == htab->elf.sdynbss
5474d94f 1868 || s == htab->elf.sdynrelro
470b557a
AK		 1869 || s == htab->elf.iplt
1870 || s == htab->elf.igotplt
1871 || s == htab->irelifunc)
0451c93c
MS		 1872 {
1873 /* Strip this section if we don't need it; see the
1874 comment below. */
1875 }
08dedd66 1876 else if (startswith (bfd_section_name (s), ".rela"))
0451c93c 1877 {
f41345a7 1878 if (s->size != 0 && s != htab->elf.srelplt)
d942d8db
SL		 1879 {
1880 relocs = true;
1881 if (s == htab->elf.irelplt)
1882 {
1883 /* In static-pie case, there are IRELATIVE-relocs in
1884 .rela.iplt (htab->irelplt), which will later be grouped
1885 to .rela.plt. On s390, the IRELATIVE relocations are
1886 always located in .rela.iplt - even for non-static case.
1887 Ensure that DT_JMPREL, DT_PLTRELA, DT_PLTRELASZ is added
1888 to the dynamic section even if htab->srelplt->size == 0.
1889 See _bfd_elf_add_dynamic_tags in bfd/elflink.c. */
1890 htab->elf.dt_jmprel_required = true;
1891 }
1892 }
ec338859 1893
0451c93c
MS		 1894 /* We use the reloc_count field as a counter if we need
1895 to copy relocs into the output file. */
1896 s->reloc_count = 0;
1897 }
1898 else
a85d7ed0
NC		 1899 {
1900 /* It's not one of our sections, so don't allocate space. */
1901 continue;
1902 }
1903
eea6121a 1904 if (s->size == 0)
a85d7ed0 1905 {
0451c93c
MS		 1906 /* If we don't need this section, strip it from the
1907 output file. This is to handle .rela.bss and
1908 .rela.plt. We must create it in
1909 create_dynamic_sections, because it must be created
1910 before the linker maps input sections to output
1911 sections. The linker does that before
1912 adjust_dynamic_symbol is called, and it is that
1913 function which decides whether anything needs to go
1914 into these sections. */
1915
8423293d 1916 s->flags |= SEC_EXCLUDE;
a85d7ed0
NC		 1917 continue;
1918 }
1919
c456f082
AM		 1920 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1921 continue;
1922
0451c93c
MS		 1923 /* Allocate memory for the section contents. We use bfd_zalloc
1924 here in case unused entries are not reclaimed before the
1925 section's contents are written out. This should not happen,
1926 but this way if it does, we get a R_390_NONE reloc instead
1927 of garbage. */
eea6121a 1928 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
0451c93c 1929 if (s->contents == NULL)
0a1b45a2 1930 return false;
a85d7ed0
NC		 1931 }
1932
3084d7a2 1933 return _bfd_elf_add_dynamic_tags (output_bfd, info, relocs);
a85d7ed0
NC		 1934}
1935
69fc87f1
MS		 1936/* Return the base VMA address which should be subtracted from real addresses
1937 when resolving @dtpoff relocation.
1938 This is PT_TLS segment p_vaddr. */
1939
1940static bfd_vma
2c3fc389 1941dtpoff_base (struct bfd_link_info *info)
69fc87f1 1942{
e1918d23
AM		 1943 /* If tls_sec is NULL, we should have signalled an error already. */
1944 if (elf_hash_table (info)->tls_sec == NULL)
69fc87f1 1945 return 0;
e1918d23 1946 return elf_hash_table (info)->tls_sec->vma;
69fc87f1
MS		 1947}
1948
1949/* Return the relocation value for @tpoff relocation
1950 if STT_TLS virtual address is ADDRESS. */
1951
1952static bfd_vma
2c3fc389 1953tpoff (struct bfd_link_info *info, bfd_vma address)
69fc87f1 1954{
e1918d23 1955 struct elf_link_hash_table *htab = elf_hash_table (info);
69fc87f1 1956
e1918d23
AM		 1957 /* If tls_sec is NULL, we should have signalled an error already. */
1958 if (htab->tls_sec == NULL)
69fc87f1 1959 return 0;
e1918d23 1960 return htab->tls_size + htab->tls_sec->vma - address;
69fc87f1
MS		 1961}
1962
1963/* Complain if TLS instruction relocation is against an invalid
1964 instruction. */
1965
1966static void
2c3fc389
NC		 1967invalid_tls_insn (bfd *input_bfd,
1968 asection *input_section,
1969 Elf_Internal_Rela *rel)
69fc87f1
MS		 1970{
1971 reloc_howto_type *howto;
1972
1973 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
4eca0228 1974 _bfd_error_handler
695344c0 1975 /* xgettext:c-format */
2dcf00ce 1976 (_("%pB(%pA+%#" PRIx64 "): invalid instruction for TLS relocation %s"),
d003868e
AM		 1977 input_bfd,
1978 input_section,
2dcf00ce 1979 (uint64_t) rel->r_offset,
69fc87f1 1980 howto->name);
77df2968 1981 bfd_set_error (bfd_error_bad_value);
69fc87f1
MS		 1982}
1983
a85d7ed0
NC		 1984/* Relocate a 390 ELF section. */
1985
0f684201 1986static int
4dfe6ac6
NC		 1987elf_s390_relocate_section (bfd *output_bfd,
1988 struct bfd_link_info *info,
1989 bfd *input_bfd,
1990 asection *input_section,
1991 bfd_byte *contents,
1992 Elf_Internal_Rela *relocs,
1993 Elf_Internal_Sym *local_syms,
1994 asection **local_sections)
a85d7ed0 1995{
0451c93c 1996 struct elf_s390_link_hash_table *htab;
a85d7ed0
NC		 1997 Elf_Internal_Shdr *symtab_hdr;
1998 struct elf_link_hash_entry **sym_hashes;
1999 bfd_vma *local_got_offsets;
a85d7ed0
NC		 2000 Elf_Internal_Rela *rel;
2001 Elf_Internal_Rela *relend;
2002
7af5d5c4
AM		 2003 if (!is_s390_elf (input_bfd))
2004 {
2005 bfd_set_error (bfd_error_wrong_format);
0a1b45a2 2006 return false;
7af5d5c4 2007 }
0ffa91dd 2008
0451c93c 2009 htab = elf_s390_hash_table (info);
4dfe6ac6 2010 if (htab == NULL)
0a1b45a2 2011 return false;
4dfe6ac6 2012
0ffa91dd 2013 symtab_hdr = &elf_symtab_hdr (input_bfd);
a85d7ed0
NC		 2014 sym_hashes = elf_sym_hashes (input_bfd);
2015 local_got_offsets = elf_local_got_offsets (input_bfd);
2016
a85d7ed0
NC		 2017 rel = relocs;
2018 relend = relocs + input_section->reloc_count;
2019 for (; rel < relend; rel++)
2020 {
5236c819 2021 unsigned int r_type;
a85d7ed0
NC		 2022 reloc_howto_type *howto;
2023 unsigned long r_symndx;
2024 struct elf_link_hash_entry *h;
2025 Elf_Internal_Sym *sym;
2026 asection *sec;
0451c93c 2027 bfd_vma off;
a85d7ed0 2028 bfd_vma relocation;
0a1b45a2 2029 bool unresolved_reloc;
a85d7ed0 2030 bfd_reloc_status_type r;
69fc87f1 2031 int tls_type;
0a1b45a2 2032 bool resolved_to_zero;
a85d7ed0
NC		 2033
2034 r_type = ELF64_R_TYPE (rel->r_info);
0451c93c 2035 if (r_type == (int) R_390_GNU_VTINHERIT
947216bf
AM		 2036 || r_type == (int) R_390_GNU_VTENTRY)
2037 continue;
5236c819 2038 if (r_type >= (int) R_390_max)
a85d7ed0
NC		 2039 {
2040 bfd_set_error (bfd_error_bad_value);
0a1b45a2 2041 return false;
a85d7ed0 2042 }
a85d7ed0 2043
b491616a 2044 howto = elf_howto_table + r_type;
a85d7ed0 2045 r_symndx = ELF64_R_SYM (rel->r_info);
5236c819 2046
a85d7ed0
NC		 2047 h = NULL;
2048 sym = NULL;
2049 sec = NULL;
0a1b45a2 2050 unresolved_reloc = false;
a85d7ed0
NC		 2051 if (r_symndx < symtab_hdr->sh_info)
2052 {
2053 sym = local_syms + r_symndx;
2054 sec = local_sections[r_symndx];
470b557a
AK		 2055
2056 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2057 {
2058 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2059 if (local_plt == NULL)
0a1b45a2 2060 return false;
470b557a
AK		 2061
2062 /* Address of the PLT slot. */
2063 relocation = (htab->elf.iplt->output_section->vma
2064 + htab->elf.iplt->output_offset
2065 + local_plt[r_symndx].plt.offset);
2066
2067 switch (r_type)
2068 {
31db78f6
AK		 2069 case R_390_PLTOFF16:
2070 case R_390_PLTOFF32:
2071 case R_390_PLTOFF64:
afca762f 2072 relocation -= s390_got_pointer (info);
31db78f6 2073 break;
470b557a
AK		 2074 case R_390_GOTPLT12:
2075 case R_390_GOTPLT16:
2076 case R_390_GOTPLT20:
2077 case R_390_GOTPLT32:
2078 case R_390_GOTPLT64:
2079 case R_390_GOTPLTENT:
2080 case R_390_GOT12:
2081 case R_390_GOT16:
2082 case R_390_GOT20:
2083 case R_390_GOT32:
2084 case R_390_GOT64:
2085 case R_390_GOTENT:
2086 {
2087 /* Write the PLT slot address into the GOT slot. */
2088 bfd_put_64 (output_bfd, relocation,
2089 htab->elf.sgot->contents +
2090 local_got_offsets[r_symndx]);
2091 relocation = (local_got_offsets[r_symndx] +
afca762f 2092 s390_got_offset (info));
470b557a
AK		 2093
2094 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
afca762f 2095 relocation += s390_got_pointer (info);
470b557a
AK		 2096 break;
2097 }
2098 default:
2099 break;
2100 }
2101 /* The output section is needed later in
2102 finish_dynamic_section when creating the dynamic
2103 relocation. */
2104 local_plt[r_symndx].sec = sec;
2105 goto do_relocation;
2106 }
2107 else
2108 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
a85d7ed0
NC		 2109 }
2110 else
2111 {
0a1b45a2
AM		 2112 bool warned ATTRIBUTE_UNUSED;
2113 bool ignored ATTRIBUTE_UNUSED;
0451c93c 2114
b2a8e766
AM		 2115 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2116 r_symndx, symtab_hdr, sym_hashes,
2117 h, sec, relocation,
62d887d4 2118 unresolved_reloc, warned, ignored);
a85d7ed0
NC		 2119 }
2120
dbaa2011 2121 if (sec != NULL && discarded_section (sec))
e4067dbb 2122 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
545fd46b 2123 rel, 1, relend, howto, 0, contents);
ab96bf03 2124
0e1862bb 2125 if (bfd_link_relocatable (info))
ab96bf03
AM		 2126 continue;
2127
b27bb18f
L		 2128 resolved_to_zero = (h != NULL
2129 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
2130
a85d7ed0
NC		 2131 switch (r_type)
2132 {
5236c819
MS		 2133 case R_390_GOTPLT12:
2134 case R_390_GOTPLT16:
bd1ea41b 2135 case R_390_GOTPLT20:
5236c819
MS		 2136 case R_390_GOTPLT32:
2137 case R_390_GOTPLT64:
2138 case R_390_GOTPLTENT:
2139 /* There are three cases for a GOTPLT relocation. 1) The
2140 relocation is against the jump slot entry of a plt that
2141 will get emitted to the output file. 2) The relocation
2142 is against the jump slot of a plt entry that has been
2143 removed. elf_s390_adjust_gotplt has created a GOT entry
2144 as replacement. 3) The relocation is against a local symbol.
2145 Cases 2) and 3) are the same as the GOT relocation code
2146 so we just have to test for case 1 and fall through for
2147 the other two. */
2148 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2149 {
2150 bfd_vma plt_index;
2151
470b557a
AK		 2152 if (s390_is_ifunc_symbol_p (h))
2153 {
afca762f
AK		 2154 /* Entry indices of .iplt and .igot.plt match
2155 1:1. No magic PLT first entry here. */
470b557a 2156 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
afca762f
AK		 2157 relocation = (plt_index * GOT_ENTRY_SIZE
2158 + s390_gotplt_offset (info)
2159 + htab->elf.igotplt->output_offset);
470b557a
AK		 2160 }
2161 else
2162 {
afca762f
AK		 2163 plt_index = ((h->plt.offset - PLT_FIRST_ENTRY_SIZE)
2164 / PLT_ENTRY_SIZE);
2165
2166 relocation = (plt_index * GOT_ENTRY_SIZE
2167 + s390_gotplt_offset (info));
470b557a 2168 }
afca762f
AK		 2169 if (r_type == R_390_GOTPLTENT)
2170 relocation += s390_got_pointer (info);
0a1b45a2 2171 unresolved_reloc = false;
5236c819
MS		 2172 break;
2173 }
2174 /* Fall through. */
2175
947216bf
AM		 2176 case R_390_GOT12:
2177 case R_390_GOT16:
bd1ea41b 2178 case R_390_GOT20:
947216bf
AM		 2179 case R_390_GOT32:
2180 case R_390_GOT64:
2181 case R_390_GOTENT:
2182 /* Relocation is to the entry for this symbol in the global
2183 offset table. */
afca762f 2184 if (htab->elf.sgot == NULL)
0451c93c 2185 abort ();
a85d7ed0 2186
947216bf
AM		 2187 if (h != NULL)
2188 {
0a1b45a2 2189 bool dyn;
a85d7ed0 2190
947216bf 2191 off = h->got.offset;
0451c93c 2192 dyn = htab->elf.dynamic_sections_created;
470b557a
AK		 2193
2194 if (s390_is_ifunc_symbol_p (h))
2195 {
2196 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2197 if (off == (bfd_vma)-1)
2198 {
2199 /* No explicit GOT usage so redirect to the
2200 got.iplt slot. */
afca762f
AK		 2201 relocation = (s390_gotplt_offset (info)
2202 + htab->elf.igotplt->output_offset
2203 + (h->plt.offset / PLT_ENTRY_SIZE
2204 * GOT_ENTRY_SIZE));
2205
2206 /* For @GOTENT the relocation is against the offset between
2207 the instruction and the symbols entry in the GOT and not
2208 between the start of the GOT and the symbols entry. We
2209 add the vma of the GOT to get the correct value. */
2210 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2211 relocation += s390_got_pointer (info);
2212
2213 break;
470b557a
AK		 2214 }
2215 else
2216 {
2217 /* Explicit GOT slots must contain the address
2218 of the PLT slot. This will be handled in
2219 finish_dynamic_symbol. */
2220 }
2221 }
0e1862bb
L		 2222 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2223 bfd_link_pic (info),
2224 h)
2225 || (bfd_link_pic (info)
470b557a 2226 && SYMBOL_REFERENCES_LOCAL (info, h))
10e7c045 2227 || resolved_to_zero)
947216bf 2228 {
e6213e09
AK		 2229 Elf_Internal_Sym *isym;
2230 asection *sym_sec;
2231
947216bf
AM		 2232 /* This is actually a static link, or it is a
2233 -Bsymbolic link and the symbol is defined
2234 locally, or the symbol was forced to be local
2235 because of a version file. We must initialize
2236 this entry in the global offset table. Since the
2237 offset must always be a multiple of 2, we use the
2238 least significant bit to record whether we have
2239 initialized it already.
2240
2241 When doing a dynamic link, we create a .rel.got
2242 relocation entry to initialize the value. This
2243 is done in the finish_dynamic_symbol routine. */
2244 if ((off & 1) != 0)
2245 off &= ~1;
2246 else
2247 {
a85d7ed0 2248 bfd_put_64 (output_bfd, relocation,
afca762f 2249 htab->elf.sgot->contents + off);
947216bf
AM		 2250 h->got.offset |= 1;
2251 }
a63cc5f7 2252
e6213e09
AK		 2253 /* When turning a GOT slot dereference into a direct
2254 reference using larl we have to make sure that
2255 the symbol is 1. properly aligned and 2. it is no
2256 ABS symbol or will become one. */
a63cc5f7 2257 if ((h->def_regular
0e1862bb 2258 && bfd_link_pic (info)
a63cc5f7
AK		 2259 && SYMBOL_REFERENCES_LOCAL (info, h))
2260 /* lgrl rx,sym@GOTENT -> larl rx, sym */
2261 && ((r_type == R_390_GOTENT
2262 && (bfd_get_16 (input_bfd,
2263 contents + rel->r_offset - 2)
2264 & 0xff0f) == 0xc408)
2265 /* lg rx, sym@GOT(r12) -> larl rx, sym */
2266 || (r_type == R_390_GOT20
2267 && (bfd_get_32 (input_bfd,
2268 contents + rel->r_offset - 2)
2269 & 0xff00f000) == 0xe300c000
2270 && bfd_get_8 (input_bfd,
e6213e09 2271 contents + rel->r_offset + 3) == 0x04))
f1dfbfdb 2272 && (isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache,
e6213e09
AK		 2273 input_bfd, r_symndx))
2274 && isym->st_shndx != SHN_ABS
2275 && h != htab->elf.hdynamic
2276 && h != htab->elf.hgot
2277 && h != htab->elf.hplt
2278 && !(isym->st_value & 1)
2279 && (sym_sec = bfd_section_from_elf_index (input_bfd,
2280 isym->st_shndx))
2281 && sym_sec->alignment_power)
a63cc5f7
AK		 2282 {
2283 unsigned short new_insn =
2284 (0xc000 | (bfd_get_8 (input_bfd,
2285 contents + rel->r_offset - 1) & 0xf0));
2286 bfd_put_16 (output_bfd, new_insn,
2287 contents + rel->r_offset - 2);
2288 r_type = R_390_PC32DBL;
2289 rel->r_addend = 2;
2290 howto = elf_howto_table + r_type;
2291 relocation = h->root.u.def.value
2292 + h->root.u.def.section->output_section->vma
2293 + h->root.u.def.section->output_offset;
2294 goto do_relocation;
2295 }
947216bf 2296 }
0451c93c 2297 else
0a1b45a2 2298 unresolved_reloc = false;
947216bf
AM		 2299 }
2300 else
2301 {
0451c93c
MS		 2302 if (local_got_offsets == NULL)
2303 abort ();
a85d7ed0 2304
947216bf 2305 off = local_got_offsets[r_symndx];
a85d7ed0 2306
947216bf
AM		 2307 /* The offset must always be a multiple of 8. We use
2308 the least significant bit to record whether we have
2309 already generated the necessary reloc. */
2310 if ((off & 1) != 0)
2311 off &= ~1;
2312 else
2313 {
2314 bfd_put_64 (output_bfd, relocation,
f41345a7 2315 htab->elf.sgot->contents + off);
a85d7ed0 2316
0e1862bb 2317 if (bfd_link_pic (info))
947216bf
AM		 2318 {
2319 asection *s;
2320 Elf_Internal_Rela outrel;
2321 bfd_byte *loc;
a85d7ed0 2322
f41345a7 2323 s = htab->elf.srelgot;
947216bf 2324 if (s == NULL)
0451c93c 2325 abort ();
a85d7ed0 2326
f41345a7
AK		 2327 outrel.r_offset = (htab->elf.sgot->output_section->vma
2328 + htab->elf.sgot->output_offset
947216bf
AM		 2329 + off);
2330 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
a85d7ed0 2331 outrel.r_addend = relocation;
947216bf
AM		 2332 loc = s->contents;
2333 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2334 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2335 }
a85d7ed0 2336
947216bf
AM		 2337 local_got_offsets[r_symndx] |= 1;
2338 }
2339 }
a85d7ed0 2340
0451c93c
MS		 2341 if (off >= (bfd_vma) -2)
2342 abort ();
2343
afca762f 2344 relocation = s390_got_offset (info) + off;
0451c93c 2345
ae9a127f
NC		 2346 /* For @GOTENT the relocation is against the offset between
2347 the instruction and the symbols entry in the GOT and not
2348 between the start of the GOT and the symbols entry. We
2349 add the vma of the GOT to get the correct value. */
5236c819
MS		 2350 if ( r_type == R_390_GOTENT
2351 || r_type == R_390_GOTPLTENT)
afca762f 2352 relocation += s390_got_pointer (info);
a85d7ed0 2353
947216bf 2354 break;
99c79b2e 2355
5236c819
MS		 2356 case R_390_GOTOFF16:
2357 case R_390_GOTOFF32:
2358 case R_390_GOTOFF64:
947216bf
AM		 2359 /* Relocation is relative to the start of the global offset
2360 table. */
a85d7ed0 2361
d47b13e0
AK		 2362 if (h != NULL
2363 && s390_is_ifunc_symbol_p (h)
2364 && h->def_regular
2365 && !bfd_link_executable (info))
2366 {
2367 relocation = (htab->elf.iplt->output_section->vma
2368 + htab->elf.iplt->output_offset
2369 + h->plt.offset
afca762f 2370 - s390_got_pointer (info));
d47b13e0
AK		 2371 goto do_relocation;
2372 }
2373
afca762f 2374 relocation -= s390_got_pointer (info);
947216bf 2375 break;
a85d7ed0 2376
947216bf 2377 case R_390_GOTPC:
a85d7ed0 2378 case R_390_GOTPCDBL:
947216bf 2379 /* Use global offset table as symbol value. */
afca762f 2380 relocation = s390_got_pointer (info);
0a1b45a2 2381 unresolved_reloc = false;
947216bf 2382 break;
a85d7ed0 2383
fb798c50 2384 case R_390_PLT12DBL:
947216bf 2385 case R_390_PLT16DBL:
fb798c50 2386 case R_390_PLT24DBL:
947216bf
AM		 2387 case R_390_PLT32:
2388 case R_390_PLT32DBL:
2389 case R_390_PLT64:
2390 /* Relocation is to the entry for this symbol in the
2391 procedure linkage table. */
a85d7ed0 2392
947216bf
AM		 2393 /* Resolve a PLT32 reloc against a local symbol directly,
2394 without using the procedure linkage table. */
2395 if (h == NULL)
2396 break;
a85d7ed0 2397
947216bf 2398 if (h->plt.offset == (bfd_vma) -1
31db78f6 2399 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
947216bf
AM		 2400 {
2401 /* We didn't make a PLT entry for this symbol. This
2402 happens when statically linking PIC code, or when
2403 using -Bsymbolic. */
2404 break;
2405 }
470b557a
AK		 2406 if (s390_is_ifunc_symbol_p (h))
2407 relocation = (htab->elf.iplt->output_section->vma
2408 + htab->elf.iplt->output_offset
2409 + h->plt.offset);
2410 else
2411 relocation = (htab->elf.splt->output_section->vma
2412 + htab->elf.splt->output_offset
2413 + h->plt.offset);
0a1b45a2 2414 unresolved_reloc = false;
26e41594 2415 break;
5236c819
MS		 2416
2417 case R_390_PLTOFF16:
2418 case R_390_PLTOFF32:
2419 case R_390_PLTOFF64:
26e41594
AM		 2420 /* Relocation is to the entry for this symbol in the
2421 procedure linkage table relative to the start of the GOT. */
5236c819
MS		 2422
2423 /* For local symbols or if we didn't make a PLT entry for
2424 this symbol resolve the symbol directly. */
31db78f6 2425 if (h == NULL
5236c819 2426 || h->plt.offset == (bfd_vma) -1
31db78f6 2427 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
5236c819 2428 {
afca762f 2429 relocation -= s390_got_pointer (info);
5236c819
MS		 2430 break;
2431 }
2432
470b557a
AK		 2433 if (s390_is_ifunc_symbol_p (h))
2434 relocation = (htab->elf.iplt->output_section->vma
2435 + htab->elf.iplt->output_offset
2436 + h->plt.offset
afca762f 2437 - s390_got_pointer (info));
470b557a
AK		 2438 else
2439 relocation = (htab->elf.splt->output_section->vma
2440 + htab->elf.splt->output_offset
2441 + h->plt.offset
afca762f 2442 - s390_got_pointer (info));
0a1b45a2 2443 unresolved_reloc = false;
947216bf
AM		 2444 break;
2445
947216bf 2446 case R_390_PC16:
fb798c50 2447 case R_390_PC12DBL:
947216bf 2448 case R_390_PC16DBL:
fb798c50 2449 case R_390_PC24DBL:
947216bf 2450 case R_390_PC32:
a85d7ed0 2451 case R_390_PC32DBL:
947216bf 2452 case R_390_PC64:
431e5de3
AK		 2453 if (h != NULL
2454 && bfd_link_pie (info)
2455 && !h->def_regular)
2456 {
871b3ab2 2457 _bfd_error_handler (_("%pB: `%s' non-PLT reloc for symbol defined "
431e5de3
AK		 2458 "in shared library and accessed "
2459 "from executable "
2460 "(rebuild file with -fPIC ?)"),
2461 input_bfd, h->root.root.string);
2462 bfd_set_error (bfd_error_bad_value);
0a1b45a2 2463 return false;
431e5de3 2464 }
99ba5125
AK		 2465 /* The target of these relocs are instruction operands
2466 residing in read-only sections. We cannot emit a runtime
2467 reloc for it. */
2468 if (h != NULL
2469 && s390_is_ifunc_symbol_p (h)
2470 && h->def_regular
2471 && bfd_link_pic (info))
2472 {
2473 relocation = (htab->elf.iplt->output_section->vma
2474 + htab->elf.iplt->output_offset
2475 + h->plt.offset);
2476 goto do_relocation;
2477 }
1a0670f3 2478 /* Fall through. */
99ba5125
AK		 2479
2480 case R_390_8:
2481 case R_390_16:
2482 case R_390_32:
2483 case R_390_64:
470b557a 2484
f657f8c4
NC		 2485 if ((input_section->flags & SEC_ALLOC) == 0)
2486 break;
2487
470b557a
AK		 2488 if (h != NULL
2489 && s390_is_ifunc_symbol_p (h)
2490 && h->def_regular)
2491 {
d7ab4911 2492 if (!bfd_link_pic (info))
470b557a 2493 {
d7ab4911
AK		 2494 /* For a non-shared object the symbol will not
2495 change. Hence we can write the address of the
2496 target IPLT slot now. */
470b557a
AK		 2497 relocation = (htab->elf.iplt->output_section->vma
2498 + htab->elf.iplt->output_offset
2499 + h ->plt.offset);
2500 goto do_relocation;
2501 }
2502 else
2503 {
2504 /* For shared objects a runtime relocation is needed. */
2505
2506 Elf_Internal_Rela outrel;
2507 asection *sreloc;
2508
2509 /* Need a dynamic relocation to get the real function
2510 address. */
2511 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2512 info,
2513 input_section,
2514 rel->r_offset);
2515 if (outrel.r_offset == (bfd_vma) -1
2516 || outrel.r_offset == (bfd_vma) -2)
2517 abort ();
2518
2519 outrel.r_offset += (input_section->output_section->vma
2520 + input_section->output_offset);
2521
2522 if (h->dynindx == -1
2523 || h->forced_local
0e1862bb 2524 || bfd_link_executable (info))
470b557a
AK		 2525 {
2526 /* This symbol is resolved locally. */
2527 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
2528 outrel.r_addend = (h->root.u.def.value
2529 + h->root.u.def.section->output_section->vma
2530 + h->root.u.def.section->output_offset);
2531 }
2532 else
2533 {
2534 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2535 outrel.r_addend = 0;
2536 }
2537
2538 sreloc = htab->elf.irelifunc;
2539 elf_append_rela (output_bfd, sreloc, &outrel);
2540
2541 /* If this reloc is against an external symbol, we
2542 do not want to fiddle with the addend. Otherwise,
2543 we need to include the symbol value so that it
2544 becomes an addend for the dynamic reloc. For an
2545 internal symbol, we have updated addend. */
2546 continue;
2547 }
2548 }
2549
0e1862bb 2550 if ((bfd_link_pic (info)
82058a73 2551 && (h == NULL
b27bb18f
L		 2552 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2553 && !resolved_to_zero)
82058a73 2554 || h->root.type != bfd_link_hash_undefweak)
0451c93c 2555 && ((r_type != R_390_PC16
fb798c50 2556 && r_type != R_390_PC12DBL
0451c93c 2557 && r_type != R_390_PC16DBL
fb798c50 2558 && r_type != R_390_PC24DBL
0451c93c
MS		 2559 && r_type != R_390_PC32
2560 && r_type != R_390_PC32DBL
2561 && r_type != R_390_PC64)
8c21ca21 2562 || !SYMBOL_CALLS_LOCAL (info, h)))
64285810 2563 || (ELIMINATE_COPY_RELOCS
0e1862bb 2564 && !bfd_link_pic (info)
0451c93c
MS		 2565 && h != NULL
2566 && h->dynindx != -1
f5385ebf
AM		 2567 && !h->non_got_ref
2568 && ((h->def_dynamic
2569 && !h->def_regular)
0451c93c
MS		 2570 || h->root.type == bfd_link_hash_undefweak
2571 || h->root.type == bfd_link_hash_undefined)))
947216bf
AM		 2572 {
2573 Elf_Internal_Rela outrel;
0a1b45a2 2574 bool skip, relocate;
0451c93c 2575 asection *sreloc;
947216bf 2576 bfd_byte *loc;
a85d7ed0 2577
947216bf
AM		 2578 /* When generating a shared object, these relocations
2579 are copied into the output file to be resolved at run
2580 time. */
0a1b45a2
AM		 2581 skip = false;
2582 relocate = false;
a85d7ed0 2583
c629eae0
JJ		 2584 outrel.r_offset =
2585 _bfd_elf_section_offset (output_bfd, info, input_section,
2586 rel->r_offset);
2587 if (outrel.r_offset == (bfd_vma) -1)
0a1b45a2 2588 skip = true;
0bb2d96a 2589 else if (outrel.r_offset == (bfd_vma) -2)
0a1b45a2 2590 skip = true, relocate = true;
a85d7ed0 2591
947216bf
AM		 2592 outrel.r_offset += (input_section->output_section->vma
2593 + input_section->output_offset);
a85d7ed0 2594
947216bf 2595 if (skip)
0bb2d96a 2596 memset (&outrel, 0, sizeof outrel);
947216bf 2597 else if (h != NULL
0451c93c
MS		 2598 && h->dynindx != -1
2599 && (r_type == R_390_PC16
fb798c50 2600 || r_type == R_390_PC12DBL
0451c93c 2601 || r_type == R_390_PC16DBL
fb798c50 2602 || r_type == R_390_PC24DBL
0451c93c
MS		 2603 || r_type == R_390_PC32
2604 || r_type == R_390_PC32DBL
2605 || r_type == R_390_PC64
0e1862bb 2606 || !bfd_link_pic (info)
8c21ca21 2607 || !SYMBOLIC_BIND (info, h)
f5385ebf 2608 || !h->def_regular))
947216bf
AM		 2609 {
2610 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
27018c3f 2611 outrel.r_addend = rel->r_addend;
947216bf
AM		 2612 }
2613 else
2614 {
0451c93c 2615 /* This symbol is local, or marked to become local. */
90ced0dd 2616 outrel.r_addend = relocation + rel->r_addend;
b5727d75
MS		 2617 if (r_type == R_390_64)
2618 {
0a1b45a2 2619 relocate = true;
b5727d75 2620 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
b5727d75
MS		 2621 }
2622 else
2623 {
2624 long sindx;
2625
90ced0dd 2626 if (bfd_is_abs_section (sec))
b5727d75
MS		 2627 sindx = 0;
2628 else if (sec == NULL || sec->owner == NULL)
2629 {
2630 bfd_set_error(bfd_error_bad_value);
0a1b45a2 2631 return false;
b5727d75
MS		 2632 }
2633 else
2634 {
2635 asection *osec;
2636
2637 osec = sec->output_section;
2638 sindx = elf_section_data (osec)->dynindx;
74541ad4
AM		 2639
2640 if (sindx == 0)
2641 {
2642 osec = htab->elf.text_index_section;
2643 sindx = elf_section_data (osec)->dynindx;
2644 }
2645 BFD_ASSERT (sindx != 0);
90ced0dd
MS		 2646
2647 /* We are turning this relocation into one
2648 against a section symbol, so subtract out
2649 the output section's address but not the
2650 offset of the input section in the output
2651 section. */
90ced0dd 2652 outrel.r_addend -= osec->vma;
b5727d75
MS		 2653 }
2654 outrel.r_info = ELF64_R_INFO (sindx, r_type);
b5727d75 2655 }
0451c93c 2656 }
a85d7ed0 2657
0451c93c
MS		 2658 sreloc = elf_section_data (input_section)->sreloc;
2659 if (sreloc == NULL)
2660 abort ();
2661
947216bf
AM		 2662 loc = sreloc->contents;
2663 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2664 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
a85d7ed0 2665
947216bf
AM		 2666 /* If this reloc is against an external symbol, we do
2667 not want to fiddle with the addend. Otherwise, we
2668 need to include the symbol value so that it becomes
2669 an addend for the dynamic reloc. */
2670 if (! relocate)
2671 continue;
2672 }
a85d7ed0 2673
947216bf 2674 break;
a85d7ed0 2675
69fc87f1
MS		 2676 /* Relocations for tls literal pool entries. */
2677 case R_390_TLS_IE64:
26b14265 2678 if (bfd_link_dll (info))
69fc87f1
MS		 2679 {
2680 Elf_Internal_Rela outrel;
2681 asection *sreloc;
2682 bfd_byte *loc;
2683
2684 outrel.r_offset = rel->r_offset
2685 + input_section->output_section->vma
2686 + input_section->output_offset;
2687 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2688 sreloc = elf_section_data (input_section)->sreloc;
2689 if (sreloc == NULL)
2690 abort ();
2691 loc = sreloc->contents;
2692 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2693 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2694 }
ae9a127f 2695 /* Fall through. */
69fc87f1
MS		 2696
2697 case R_390_TLS_GD64:
2698 case R_390_TLS_GOTIE64:
2699 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2700 tls_type = GOT_UNKNOWN;
2701 if (h == NULL && local_got_offsets)
2702 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2703 else if (h != NULL)
2704 {
2705 tls_type = elf_s390_hash_entry(h)->tls_type;
26b14265 2706 if (!bfd_link_dll (info) && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
69fc87f1
MS		 2707 r_type = R_390_TLS_LE64;
2708 }
2709 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2710 r_type = R_390_TLS_IE64;
2711
2712 if (r_type == R_390_TLS_LE64)
2713 {
2714 /* This relocation gets optimized away by the local exec
2715 access optimization. */
2716 BFD_ASSERT (! unresolved_reloc);
2717 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2718 contents + rel->r_offset);
2719 continue;
2720 }
2721
f41345a7 2722 if (htab->elf.sgot == NULL)
69fc87f1
MS		 2723 abort ();
2724
2725 if (h != NULL)
2726 off = h->got.offset;
2727 else
2728 {
2729 if (local_got_offsets == NULL)
2730 abort ();
2731
2732 off = local_got_offsets[r_symndx];
2733 }
2734
2735 emit_tls_relocs:
2736
2737 if ((off & 1) != 0)
2738 off &= ~1;
26e41594 2739 else
69fc87f1
MS		 2740 {
2741 Elf_Internal_Rela outrel;
2742 bfd_byte *loc;
2743 int dr_type, indx;
2744
f41345a7 2745 if (htab->elf.srelgot == NULL)
69fc87f1
MS		 2746 abort ();
2747
f41345a7
AK		 2748 outrel.r_offset = (htab->elf.sgot->output_section->vma
2749 + htab->elf.sgot->output_offset + off);
69fc87f1
MS		 2750
2751 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2752 if (r_type == R_390_TLS_GD64)
2753 dr_type = R_390_TLS_DTPMOD;
2754 else
2755 dr_type = R_390_TLS_TPOFF;
2756 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2757 outrel.r_addend = relocation - dtpoff_base (info);
2758 else
2759 outrel.r_addend = 0;
2760 outrel.r_info = ELF64_R_INFO (indx, dr_type);
f41345a7
AK		 2761 loc = htab->elf.srelgot->contents;
2762 loc += htab->elf.srelgot->reloc_count++
69fc87f1
MS		 2763 * sizeof (Elf64_External_Rela);
2764 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2765
2766 if (r_type == R_390_TLS_GD64)
2767 {
2768 if (indx == 0)
2769 {
07d6d2b8 2770 BFD_ASSERT (! unresolved_reloc);
69fc87f1
MS		 2771 bfd_put_64 (output_bfd,
2772 relocation - dtpoff_base (info),
f41345a7 2773 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
69fc87f1
MS		 2774 }
2775 else
2776 {
2777 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2778 outrel.r_offset += GOT_ENTRY_SIZE;
2779 outrel.r_addend = 0;
f41345a7 2780 htab->elf.srelgot->reloc_count++;
69fc87f1
MS		 2781 loc += sizeof (Elf64_External_Rela);
2782 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2783 }
2784 }
2785
2786 if (h != NULL)
2787 h->got.offset |= 1;
2788 else
2789 local_got_offsets[r_symndx] |= 1;
2790 }
2791
2792 if (off >= (bfd_vma) -2)
2793 abort ();
2794 if (r_type == ELF64_R_TYPE (rel->r_info))
2795 {
f41345a7 2796 relocation = htab->elf.sgot->output_offset + off;
69fc87f1 2797 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
f41345a7 2798 relocation += htab->elf.sgot->output_section->vma;
0a1b45a2 2799 unresolved_reloc = false;
69fc87f1
MS		 2800 }
2801 else
2802 {
f41345a7 2803 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off,
69fc87f1
MS		 2804 contents + rel->r_offset);
2805 continue;
2806 }
2807 break;
2808
2809 case R_390_TLS_GOTIE12:
bd1ea41b 2810 case R_390_TLS_GOTIE20:
69fc87f1
MS		 2811 case R_390_TLS_IEENT:
2812 if (h == NULL)
2813 {
2814 if (local_got_offsets == NULL)
2815 abort();
2816 off = local_got_offsets[r_symndx];
26b14265 2817 if (bfd_link_dll (info))
69fc87f1
MS		 2818 goto emit_tls_relocs;
2819 }
2820 else
2821 {
2822 off = h->got.offset;
2823 tls_type = elf_s390_hash_entry(h)->tls_type;
26b14265 2824 if (bfd_link_dll (info) || h->dynindx != -1 || tls_type < GOT_TLS_IE)
69fc87f1
MS		 2825 goto emit_tls_relocs;
2826 }
2827
f41345a7 2828 if (htab->elf.sgot == NULL)
69fc87f1
MS		 2829 abort ();
2830
2831 BFD_ASSERT (! unresolved_reloc);
2832 bfd_put_64 (output_bfd, -tpoff (info, relocation),
f41345a7
AK		 2833 htab->elf.sgot->contents + off);
2834 relocation = htab->elf.sgot->output_offset + off;
69fc87f1 2835 if (r_type == R_390_TLS_IEENT)
f41345a7 2836 relocation += htab->elf.sgot->output_section->vma;
0a1b45a2 2837 unresolved_reloc = false;
69fc87f1
MS		 2838 break;
2839
2840 case R_390_TLS_LDM64:
26b14265 2841 if (! bfd_link_dll (info))
69fc87f1
MS		 2842 /* The literal pool entry this relocation refers to gets ignored
2843 by the optimized code of the local exec model. Do nothing
2844 and the value will turn out zero. */
2845 continue;
2846
f41345a7 2847 if (htab->elf.sgot == NULL)
69fc87f1
MS		 2848 abort ();
2849
2850 off = htab->tls_ldm_got.offset;
2851 if (off & 1)
2852 off &= ~1;
2853 else
2854 {
2855 Elf_Internal_Rela outrel;
2856 bfd_byte *loc;
2857
f41345a7 2858 if (htab->elf.srelgot == NULL)
69fc87f1
MS		 2859 abort ();
2860
f41345a7
AK		 2861 outrel.r_offset = (htab->elf.sgot->output_section->vma
2862 + htab->elf.sgot->output_offset + off);
69fc87f1
MS		 2863
2864 bfd_put_64 (output_bfd, 0,
f41345a7 2865 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
69fc87f1
MS		 2866 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2867 outrel.r_addend = 0;
f41345a7
AK		 2868 loc = htab->elf.srelgot->contents;
2869 loc += htab->elf.srelgot->reloc_count++
69fc87f1
MS		 2870 * sizeof (Elf64_External_Rela);
2871 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2872 htab->tls_ldm_got.offset |= 1;
2873 }
f41345a7 2874 relocation = htab->elf.sgot->output_offset + off;
0a1b45a2 2875 unresolved_reloc = false;
69fc87f1
MS		 2876 break;
2877
2878 case R_390_TLS_LE64:
3cbc1e5e 2879 if (bfd_link_dll (info))
69fc87f1
MS		 2880 {
2881 /* Linking a shared library with non-fpic code requires
2882 a R_390_TLS_TPOFF relocation. */
2883 Elf_Internal_Rela outrel;
2884 asection *sreloc;
2885 bfd_byte *loc;
2886 int indx;
2887
2888 outrel.r_offset = rel->r_offset
2889 + input_section->output_section->vma
2890 + input_section->output_offset;
2891 if (h != NULL && h->dynindx != -1)
2892 indx = h->dynindx;
2893 else
2894 indx = 0;
2895 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
2896 if (indx == 0)
2897 outrel.r_addend = relocation - dtpoff_base (info);
2898 else
2899 outrel.r_addend = 0;
2900 sreloc = elf_section_data (input_section)->sreloc;
2901 if (sreloc == NULL)
2902 abort ();
2903 loc = sreloc->contents;
2904 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2905 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2906 }
2907 else
2908 {
2909 BFD_ASSERT (! unresolved_reloc);
2910 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2911 contents + rel->r_offset);
2912 }
2913 continue;
2914
2915 case R_390_TLS_LDO64:
26b14265 2916 if (bfd_link_dll (info) || (input_section->flags & SEC_DEBUGGING))
69fc87f1
MS		 2917 relocation -= dtpoff_base (info);
2918 else
2919 /* When converting LDO to LE, we must negate. */
2920 relocation = -tpoff (info, relocation);
2921 break;
2922
2923 /* Relocations for tls instructions. */
2924 case R_390_TLS_LOAD:
2925 case R_390_TLS_GDCALL:
2926 case R_390_TLS_LDCALL:
2927 tls_type = GOT_UNKNOWN;
2928 if (h == NULL && local_got_offsets)
2929 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2930 else if (h != NULL)
2931 tls_type = elf_s390_hash_entry(h)->tls_type;
2932
2933 if (tls_type == GOT_TLS_GD)
2934 continue;
2935
2936 if (r_type == R_390_TLS_LOAD)
2937 {
26b14265 2938 if (!bfd_link_dll (info) && (h == NULL || h->dynindx == -1))
69fc87f1
MS		 2939 {
2940 /* IE->LE transition. Four valid cases:
2941 lg %rx,(0,%ry) -> sllg %rx,%ry,0
2942 lg %rx,(%ry,0) -> sllg %rx,%ry,0
2943 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
2944 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
2945 unsigned int insn0, insn1, ry;
2946
2947 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2948 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2949 if (insn1 != 0x0004)
3704e358
AK		 2950 {
2951 invalid_tls_insn (input_bfd, input_section, rel);
0a1b45a2 2952 return false;
3704e358 2953 }
69fc87f1
MS		 2954 if ((insn0 & 0xff00f000) == 0xe3000000)
2955 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
2956 ry = (insn0 & 0x000f0000);
2957 else if ((insn0 & 0xff0f0000) == 0xe3000000)
2958 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
2959 ry = (insn0 & 0x0000f000) << 4;
2960 else if ((insn0 & 0xff00f000) == 0xe300c000)
2961 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
2962 ry = (insn0 & 0x000f0000);
2963 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
2964 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
2965 ry = (insn0 & 0x0000f000) << 4;
2966 else
3704e358
AK		 2967 {
2968 invalid_tls_insn (input_bfd, input_section, rel);
0a1b45a2 2969 return false;
3704e358 2970 }
69fc87f1
MS		 2971 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
2972 insn1 = 0x000d;
2973 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2974 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2975 }
2976 }
2977 else if (r_type == R_390_TLS_GDCALL)
2978 {
2979 unsigned int insn0, insn1;
2980
2981 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2982 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2983 if ((insn0 & 0xffff0000) != 0xc0e50000)
3704e358
AK		 2984 {
2985 invalid_tls_insn (input_bfd, input_section, rel);
0a1b45a2 2986 return false;
3704e358 2987 }
26b14265 2988 if (!bfd_link_dll (info) && (h == NULL || h->dynindx == -1))
69fc87f1
MS		 2989 {
2990 /* GD->LE transition.
2991 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2992 insn0 = 0xc0040000;
2993 insn1 = 0x0000;
2994 }
2995 else
2996 {
2997 /* GD->IE transition.
2998 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
2999 insn0 = 0xe322c000;
3000 insn1 = 0x0004;
3001 }
3002 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3003 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3004 }
3005 else if (r_type == R_390_TLS_LDCALL)
3006 {
26b14265 3007 if (!bfd_link_dll (info))
69fc87f1
MS		 3008 {
3009 unsigned int insn0, insn1;
3010
3011 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3012 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3013 if ((insn0 & 0xffff0000) != 0xc0e50000)
3704e358
AK		 3014 {
3015 invalid_tls_insn (input_bfd, input_section, rel);
0a1b45a2 3016 return false;
3704e358 3017 }
69fc87f1
MS		 3018 /* LD->LE transition.
3019 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3020 insn0 = 0xc0040000;
3021 insn1 = 0x0000;
3022 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3023 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3024 }
3025 }
3026 continue;
3027
947216bf
AM		 3028 default:
3029 break;
3030 }
a85d7ed0 3031
239e1f3a
AM		 3032 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3033 because such sections are not SEC_ALLOC and thus ld.so will
3034 not process them. */
0451c93c 3035 if (unresolved_reloc
239e1f3a 3036 && !((input_section->flags & SEC_DEBUGGING) != 0
1d5316ab
AM		 3037 && h->def_dynamic)
3038 && _bfd_elf_section_offset (output_bfd, info, input_section,
3039 rel->r_offset) != (bfd_vma) -1)
4eca0228 3040 _bfd_error_handler
695344c0 3041 /* xgettext:c-format */
2dcf00ce
AM		 3042 (_("%pB(%pA+%#" PRIx64 "): "
3043 "unresolvable %s relocation against symbol `%s'"),
d003868e
AM		 3044 input_bfd,
3045 input_section,
2dcf00ce 3046 (uint64_t) rel->r_offset,
843fe662 3047 howto->name,
0451c93c
MS		 3048 h->root.root.string);
3049
470b557a
AK		 3050 do_relocation:
3051
fb798c50
AK		 3052 /* When applying a 24 bit reloc we need to start one byte
3053 earlier. Otherwise the 32 bit get/put bfd operations might
3054 access a byte after the actual section. */
3055 if (r_type == R_390_PC24DBL
3056 || r_type == R_390_PLT24DBL)
3057 rel->r_offset--;
3058
bd1ea41b
MS		 3059 if (r_type == R_390_20
3060 || r_type == R_390_GOT20
3061 || r_type == R_390_GOTPLT20
3062 || r_type == R_390_TLS_GOTIE20)
3063 {
3064 relocation += rel->r_addend;
3065 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3066 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3067 contents, rel->r_offset,
3068 relocation, 0);
3069 }
3070 else
3071 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
a85d7ed0
NC		 3072 contents, rel->r_offset,
3073 relocation, rel->r_addend);
3074
3075 if (r != bfd_reloc_ok)
3076 {
0451c93c 3077 const char *name;
ec338859 3078
0451c93c
MS		 3079 if (h != NULL)
3080 name = h->root.root.string;
3081 else
a85d7ed0 3082 {
0451c93c
MS		 3083 name = bfd_elf_string_from_elf_section (input_bfd,
3084 symtab_hdr->sh_link,
3085 sym->st_name);
3086 if (name == NULL)
0a1b45a2 3087 return false;
0451c93c 3088 if (*name == '\0')
fd361982 3089 name = bfd_section_name (sec);
0451c93c 3090 }
ec338859 3091
0451c93c 3092 if (r == bfd_reloc_overflow)
1a72702b
AM		 3093 (*info->callbacks->reloc_overflow)
3094 (info, (h ? &h->root : NULL), name, howto->name,
3095 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
0451c93c
MS		 3096 else
3097 {
4eca0228 3098 _bfd_error_handler
695344c0 3099 /* xgettext:c-format */
2dcf00ce 3100 (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
d003868e 3101 input_bfd, input_section,
2dcf00ce 3102 (uint64_t) rel->r_offset, name, (int) r);
0a1b45a2 3103 return false;
a85d7ed0
NC		 3104 }
3105 }
3106 }
3107
0a1b45a2 3108 return true;
a85d7ed0
NC		 3109}
3110
470b557a
AK		 3111/* Generate the PLT slots together with the dynamic relocations needed
3112 for IFUNC symbols. */
3113
3114static void
3115elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3116 struct bfd_link_info *info,
3117 struct elf_link_hash_entry *h,
3118 struct elf_s390_link_hash_table *htab,
3119 bfd_vma plt_offset,
3120 bfd_vma resolver_address)
3121{
3122 bfd_vma plt_index;
3123 bfd_vma got_offset;
3124 Elf_Internal_Rela rela;
3125 bfd_byte *loc;
3126 asection *plt, *gotplt, *relplt;
3127
3128 if (htab->elf.iplt == NULL
3129 || htab->elf.igotplt == NULL
3130 || htab->elf.irelplt == NULL)
3131 abort ();
3132
3133 /* Index of the PLT slot within iplt section. */
3134 plt_index = plt_offset / PLT_ENTRY_SIZE;
3135 plt = htab->elf.iplt;
3136 /* Offset into the igot.plt section. */
3137 got_offset = plt_index * GOT_ENTRY_SIZE;
3138 gotplt = htab->elf.igotplt;
3139 relplt = htab->elf.irelplt;
3140
3141 /* Fill in the blueprint of a PLT. */
3142 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry,
3143 PLT_ENTRY_SIZE);
3144
3145 /* Fixup the relative address to the GOT entry */
3146 bfd_put_32 (output_bfd,
3147 (gotplt->output_section->vma +
3148 gotplt->output_offset + got_offset
3149 - (plt->output_section->vma +
3150 plt->output_offset +
3151 plt_offset))/2,
3152 plt->contents + plt_offset + 2);
3153 /* Fixup the relative branch to PLT 0 */
3154 bfd_put_32 (output_bfd, - (plt->output_offset +
3155 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3156 plt->contents + plt_offset + 24);
3157 /* Fixup offset into .rela.plt section. */
3158 bfd_put_32 (output_bfd, relplt->output_offset +
3159 plt_index * sizeof (Elf64_External_Rela),
3160 plt->contents + plt_offset + 28);
3161
3162 /* Fill in the entry in the global offset table.
3163 Points to instruction after GOT offset. */
3164 bfd_put_64 (output_bfd,
3165 (plt->output_section->vma
3166 + plt->output_offset
3167 + plt_offset
3168 + 14),
3169 gotplt->contents + got_offset);
3170
3171 /* Fill in the entry in the .rela.plt section. */
3172 rela.r_offset = (gotplt->output_section->vma
3173 + gotplt->output_offset
3174 + got_offset);
3175
3176 if (!h
3177 || h->dynindx == -1
0e1862bb 3178 || ((bfd_link_executable (info)
470b557a
AK		 3179 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3180 && h->def_regular))
3181 {
3182 /* The symbol can be locally resolved. */
3183 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
3184 rela.r_addend = resolver_address;
3185 }
3186 else
3187 {
3188 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3189 rela.r_addend = 0;
3190 }
3191
3192 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela);
3193 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3194}
3195
3196
a85d7ed0
NC		 3197/* Finish up dynamic symbol handling. We set the contents of various
3198 dynamic sections here. */
3199
0a1b45a2 3200static bool
4dfe6ac6
NC		 3201elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3202 struct bfd_link_info *info,
3203 struct elf_link_hash_entry *h,
3204 Elf_Internal_Sym *sym)
a85d7ed0 3205{
0451c93c 3206 struct elf_s390_link_hash_table *htab;
470b557a 3207 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
a85d7ed0 3208
0451c93c 3209 htab = elf_s390_hash_table (info);
4dfe6ac6 3210 if (htab == NULL)
0a1b45a2 3211 return false;
a85d7ed0
NC		 3212
3213 if (h->plt.offset != (bfd_vma) -1)
3214 {
a85d7ed0 3215 bfd_vma plt_index;
afca762f 3216 bfd_vma gotplt_offset;
0451c93c 3217 Elf_Internal_Rela rela;
947216bf 3218 bfd_byte *loc;
a85d7ed0
NC		 3219
3220 /* This symbol has an entry in the procedure linkage table. Set
947216bf 3221 it up. */
0a511368 3222 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
470b557a 3223 {
0a511368
AK		 3224 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3225 htab, h->plt.offset,
3226 eh->ifunc_resolver_address +
3227 eh->ifunc_resolver_section->output_offset +
3228 eh->ifunc_resolver_section->output_section->vma);
3229
3230 /* Do not return yet. Handling of explicit GOT slots of
3231 IFUNC symbols is below. */
470b557a
AK		 3232 }
3233 else
3234 {
3235 if (h->dynindx == -1
3236 || htab->elf.splt == NULL
3237 || htab->elf.sgotplt == NULL
3238 || htab->elf.srelplt == NULL)
3239 abort ();
a85d7ed0 3240
470b557a
AK		 3241 /* Calc. index no.
3242 Current offset - size first entry / entry size. */
3243 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
a85d7ed0 3244
afca762f
AK		 3245 /* The slots in the .got.plt correspond to the PLT slots in
3246 the same order. */
3247 gotplt_offset = plt_index * GOT_ENTRY_SIZE;
3248
3249 /* If .got.plt comes first it needs to contain the 3 header
3250 entries. */
3251 if (!s390_gotplt_after_got_p (info))
3252 gotplt_offset += 3 * GOT_ENTRY_SIZE;
a85d7ed0 3253
470b557a
AK		 3254 /* Fill in the blueprint of a PLT. */
3255 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry,
3256 PLT_ENTRY_SIZE);
3257
afca762f
AK		 3258 /* The first instruction in the PLT entry is a LARL loading
3259 the address of the GOT slot. We write the 4 byte
3260 immediate operand of the LARL instruction here. */
470b557a
AK		 3261 bfd_put_32 (output_bfd,
3262 (htab->elf.sgotplt->output_section->vma +
afca762f 3263 htab->elf.sgotplt->output_offset + gotplt_offset
470b557a
AK		 3264 - (htab->elf.splt->output_section->vma +
3265 htab->elf.splt->output_offset +
3266 h->plt.offset))/2,
3267 htab->elf.splt->contents + h->plt.offset + 2);
3268 /* Fixup the relative branch to PLT 0 */
3269 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3270 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3271 htab->elf.splt->contents + h->plt.offset + 24);
3272 /* Fixup offset into .rela.plt section. */
3273 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3274 htab->elf.splt->contents + h->plt.offset + 28);
3275
3276 /* Fill in the entry in the global offset table.
3277 Points to instruction after GOT offset. */
3278 bfd_put_64 (output_bfd,
3279 (htab->elf.splt->output_section->vma
3280 + htab->elf.splt->output_offset
3281 + h->plt.offset
3282 + 14),
afca762f 3283 htab->elf.sgotplt->contents + gotplt_offset);
470b557a
AK		 3284
3285 /* Fill in the entry in the .rela.plt section. */
3286 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3287 + htab->elf.sgotplt->output_offset
afca762f 3288 + gotplt_offset);
470b557a
AK		 3289 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3290 rela.r_addend = 0;
3291 loc = htab->elf.srelplt->contents + plt_index *
3292 sizeof (Elf64_External_Rela);
3293 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3294
3295 if (!h->def_regular)
3296 {
3297 /* Mark the symbol as undefined, rather than as defined in
3298 the .plt section. Leave the value alone. This is a clue
3299 for the dynamic linker, to make function pointer
3300 comparisons work between an application and shared
3301 library. */
3302 sym->st_shndx = SHN_UNDEF;
3303 }
a85d7ed0
NC		 3304 }
3305 }
3306
69fc87f1
MS		 3307 if (h->got.offset != (bfd_vma) -1
3308 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3309 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3310 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
a85d7ed0 3311 {
a85d7ed0 3312 Elf_Internal_Rela rela;
947216bf 3313 bfd_byte *loc;
a85d7ed0
NC		 3314
3315 /* This symbol has an entry in the global offset table. Set it
947216bf 3316 up. */
f41345a7 3317 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
0451c93c 3318 abort ();
a85d7ed0 3319
f41345a7
AK		 3320 rela.r_offset = (htab->elf.sgot->output_section->vma
3321 + htab->elf.sgot->output_offset
dc810e39 3322 + (h->got.offset &~ (bfd_vma) 1));
a85d7ed0 3323
470b557a
AK		 3324 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3325 {
0e1862bb 3326 if (bfd_link_pic (info))
470b557a
AK		 3327 {
3328 /* An explicit GOT slot usage needs GLOB_DAT. If the
3329 symbol references local the implicit got.iplt slot
3330 will be used and the IRELATIVE reloc has been created
3331 above. */
3332 goto do_glob_dat;
3333 }
3334 else
3335 {
3336 /* For non-shared objects explicit GOT slots must be
3337 filled with the PLT slot address for pointer
3338 equality reasons. */
3339 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma
3340 + htab->elf.iplt->output_offset
3341 + h->plt.offset),
3342 htab->elf.sgot->contents + h->got.offset);
0a1b45a2 3343 return true;
470b557a
AK		 3344 }
3345 }
0e1862bb 3346 else if (bfd_link_pic (info)
ceada896 3347 && SYMBOL_REFERENCES_LOCAL (info, h))
947216bf 3348 {
10e7c045 3349 if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
0a1b45a2 3350 return true;
10e7c045 3351
470b557a
AK		 3352 /* If this is a static link, or it is a -Bsymbolic link and
3353 the symbol is defined locally or was forced to be local
3354 because of a version file, we just want to emit a
3355 RELATIVE reloc. The entry in the global offset table
3356 will already have been initialized in the
3357 relocate_section function. */
8170f769 3358 if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
0a1b45a2 3359 return false;
0451c93c 3360 BFD_ASSERT((h->got.offset & 1) != 0);
947216bf
AM		 3361 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3362 rela.r_addend = (h->root.u.def.value
3363 + h->root.u.def.section->output_section->vma
3364 + h->root.u.def.section->output_offset);
3365 }
a85d7ed0
NC		 3366 else
3367 {
3368 BFD_ASSERT((h->got.offset & 1) == 0);
ceada896 3369 do_glob_dat:
f41345a7 3370 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
a85d7ed0 3371 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
947216bf
AM		 3372 rela.r_addend = 0;
3373 }
a85d7ed0 3374
f41345a7
AK		 3375 loc = htab->elf.srelgot->contents;
3376 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
0451c93c 3377 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
a85d7ed0
NC		 3378 }
3379
f5385ebf 3380 if (h->needs_copy)
a85d7ed0 3381 {
a85d7ed0 3382 Elf_Internal_Rela rela;
5474d94f 3383 asection *s;
947216bf 3384 bfd_byte *loc;
a85d7ed0
NC		 3385
3386 /* This symbols needs a copy reloc. Set it up. */
3387
0451c93c
MS		 3388 if (h->dynindx == -1
3389 || (h->root.type != bfd_link_hash_defined
3390 && h->root.type != bfd_link_hash_defweak)
9d19e4fd 3391 || htab->elf.srelbss == NULL)
0451c93c 3392 abort ();
a85d7ed0
NC		 3393
3394 rela.r_offset = (h->root.u.def.value
3395 + h->root.u.def.section->output_section->vma
3396 + h->root.u.def.section->output_offset);
3397 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3398 rela.r_addend = 0;
afbf7e8e 3399 if (h->root.u.def.section == htab->elf.sdynrelro)
5474d94f
AM		 3400 s = htab->elf.sreldynrelro;
3401 else
3402 s = htab->elf.srelbss;
3403 loc = s->contents + s->reloc_count++ * sizeof (Elf64_External_Rela);
0451c93c 3404 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
a85d7ed0
NC		 3405 }
3406
3407 /* Mark some specially defined symbols as absolute. */
9637f6ef 3408 if (h == htab->elf.hdynamic
22edb2f1
RS		 3409 || h == htab->elf.hgot
3410 || h == htab->elf.hplt)
a85d7ed0
NC		 3411 sym->st_shndx = SHN_ABS;
3412
0a1b45a2 3413 return true;
a85d7ed0
NC		 3414}
3415
0451c93c
MS		 3416/* Used to decide how to sort relocs in an optimal manner for the
3417 dynamic linker, before writing them out. */
3418
3419static enum elf_reloc_type_class
7e612e98
AM		 3420elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3421 const asection *rel_sec ATTRIBUTE_UNUSED,
3422 const Elf_Internal_Rela *rela)
0451c93c 3423{
0f042c67
AK		 3424 bfd *abfd = info->output_bfd;
3425 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3426 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3427 unsigned long r_symndx = ELF64_R_SYM (rela->r_info);
3428 Elf_Internal_Sym sym;
3429
3430 if (htab->elf.dynsym == NULL
3431 || !bed->s->swap_symbol_in (abfd,
3432 (htab->elf.dynsym->contents
3433 + r_symndx * bed->s->sizeof_sym),
3434 0, &sym))
3435 abort ();
3436
3437 /* Check relocation against STT_GNU_IFUNC symbol. */
3438 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3439 return reloc_class_ifunc;
3440
0451c93c
MS		 3441 switch ((int) ELF64_R_TYPE (rela->r_info))
3442 {
3443 case R_390_RELATIVE:
3444 return reloc_class_relative;
3445 case R_390_JMP_SLOT:
3446 return reloc_class_plt;
3447 case R_390_COPY:
3448 return reloc_class_copy;
3449 default:
3450 return reloc_class_normal;
3451 }
3452}
3453
a85d7ed0
NC		 3454/* Finish up the dynamic sections. */
3455
0a1b45a2 3456static bool
4dfe6ac6
NC		 3457elf_s390_finish_dynamic_sections (bfd *output_bfd,
3458 struct bfd_link_info *info)
a85d7ed0 3459{
0451c93c 3460 struct elf_s390_link_hash_table *htab;
a85d7ed0
NC		 3461 bfd *dynobj;
3462 asection *sdyn;
470b557a
AK		 3463 bfd *ibfd;
3464 unsigned int i;
a85d7ed0 3465
0451c93c 3466 htab = elf_s390_hash_table (info);
4dfe6ac6 3467 if (htab == NULL)
0a1b45a2 3468 return false;
4dfe6ac6 3469
0451c93c 3470 dynobj = htab->elf.dynobj;
3d4d4302 3471 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
a85d7ed0 3472
0451c93c 3473 if (htab->elf.dynamic_sections_created)
a85d7ed0 3474 {
a85d7ed0
NC		 3475 Elf64_External_Dyn *dyncon, *dynconend;
3476
f41345a7 3477 if (sdyn == NULL || htab->elf.sgot == NULL)
0451c93c 3478 abort ();
a85d7ed0
NC		 3479
3480 dyncon = (Elf64_External_Dyn *) sdyn->contents;
eea6121a 3481 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
a85d7ed0
NC		 3482 for (; dyncon < dynconend; dyncon++)
3483 {
3484 Elf_Internal_Dyn dyn;
a85d7ed0 3485 asection *s;
ec338859 3486
a85d7ed0 3487 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
ec338859 3488
a85d7ed0
NC		 3489 switch (dyn.d_tag)
3490 {
3491 default:
0451c93c 3492 continue;
ec338859 3493
a85d7ed0 3494 case DT_PLTGOT:
afca762f
AK		 3495 /* DT_PLTGOT matches _GLOBAL_OFFSET_TABLE_ */
3496 dyn.d_un.d_ptr = s390_got_pointer (info);
0451c93c 3497 break;
ec338859 3498
a85d7ed0 3499 case DT_JMPREL:
4ade44b7
AM		 3500 s = htab->elf.srelplt;
3501 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
a85d7ed0 3502 break;
ec338859 3503
a85d7ed0 3504 case DT_PLTRELSZ:
79c12fae
AK		 3505 dyn.d_un.d_val = htab->elf.srelplt->size;
3506 if (htab->elf.irelplt)
3507 dyn.d_un.d_val += htab->elf.irelplt->size;
a85d7ed0 3508 break;
ec338859 3509
a85d7ed0
NC		 3510 case DT_RELASZ:
3511 /* The procedure linkage table relocs (DT_JMPREL) should
3512 not be included in the overall relocs (DT_RELA).
3513 Therefore, we override the DT_RELASZ entry here to
3514 make it not include the JMPREL relocs. Since the
3515 linker script arranges for .rela.plt to follow all
3516 other relocation sections, we don't have to worry
3517 about changing the DT_RELA entry. */
79c12fae
AK		 3518 dyn.d_un.d_val -= htab->elf.srelplt->size;
3519 if (htab->elf.irelplt)
3520 dyn.d_un.d_val -= htab->elf.irelplt->size;
a85d7ed0
NC		 3521 break;
3522 }
0451c93c
MS		 3523
3524 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
a85d7ed0
NC		 3525 }
3526
3527 /* Fill in the special first entry in the procedure linkage table. */
f41345a7 3528 if (htab->elf.splt && htab->elf.splt->size > 0)
a85d7ed0
NC		 3529 {
3530 /* fill in blueprint for plt 0 entry */
f41345a7 3531 memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry,
9aa17453 3532 PLT_FIRST_ENTRY_SIZE);
afca762f
AK		 3533 /* The second instruction in the first PLT entry is a LARL
3534 loading the GOT pointer. Fill in the LARL immediate
3535 address. */
a85d7ed0 3536 bfd_put_32 (output_bfd,
afca762f 3537 (s390_got_pointer (info)
161db279
AK		 3538 - htab->elf.splt->output_section->vma
3539 - htab->elf.splt->output_offset - 6)/2,
f41345a7 3540 htab->elf.splt->contents + 8);
a85d7ed0 3541 }
387f8054
MR		 3542 if (elf_section_data (htab->elf.splt->output_section) != NULL)
3543 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
3544 = PLT_ENTRY_SIZE;
a85d7ed0
NC		 3545 }
3546
afca762f 3547 if (htab->elf.hgot && htab->elf.hgot->root.u.def.section)
a85d7ed0 3548 {
0451c93c 3549 /* Fill in the first three entries in the global offset table. */
afca762f 3550 if (htab->elf.hgot->root.u.def.section->size > 0)
0451c93c
MS		 3551 {
3552 bfd_put_64 (output_bfd,
3553 (sdyn == NULL ? (bfd_vma) 0
3554 : sdyn->output_section->vma + sdyn->output_offset),
afca762f 3555 htab->elf.hgot->root.u.def.section->contents);
0451c93c 3556 /* One entry for shared object struct ptr. */
afca762f
AK		 3557 bfd_put_64 (output_bfd, (bfd_vma) 0,
3558 htab->elf.hgot->root.u.def.section->contents + 8);
0451c93c 3559 /* One entry for _dl_runtime_resolve. */
afca762f
AK		 3560 bfd_put_64 (output_bfd, (bfd_vma) 0,
3561 htab->elf.hgot->root.u.def.section->contents + 16);
0451c93c 3562 }
cbf097d7 3563 if (htab->elf.sgot != NULL && htab->elf.sgot->size > 0)
a4eba608
NC		 3564 elf_section_data (htab->elf.sgot->output_section)
3565 ->this_hdr.sh_entsize = 8;
0451c93c 3566 }
470b557a
AK		 3567
3568 /* Finish dynamic symbol for local IFUNC symbols. */
c72f2fb2 3569 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
470b557a
AK		 3570 {
3571 struct plt_entry *local_plt;
3572 Elf_Internal_Sym *isym;
3573 Elf_Internal_Shdr *symtab_hdr;
3574
3575 symtab_hdr = &elf_symtab_hdr (ibfd);
3576
1ef692ea
AK		 3577 if (!is_s390_elf (ibfd))
3578 continue;
3579
470b557a
AK		 3580 local_plt = elf_s390_local_plt (ibfd);
3581 if (local_plt != NULL)
3582 for (i = 0; i < symtab_hdr->sh_info; i++)
3583 {
3584 if (local_plt[i].plt.offset != (bfd_vma) -1)
3585 {
3586 asection *sec = local_plt[i].sec;
f1dfbfdb 3587 isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, ibfd, i);
470b557a 3588 if (isym == NULL)
0a1b45a2 3589 return false;
470b557a
AK		 3590
3591 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3592 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3593 local_plt[i].plt.offset,
3594 isym->st_value
3595 + sec->output_section->vma
3596 + sec->output_offset);
3597
3598 }
3599 }
3600 }
3601
0a1b45a2 3602 return true;
a85d7ed0 3603}
e3e9290d
AA		 3604\f
3605/* Support for core dump NOTE sections. */
a85d7ed0 3606
0a1b45a2 3607static bool
e3e9290d
AA		 3608elf_s390_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
3609{
3610 int offset;
3611 size_t size;
3612
3613 switch (note->descsz)
3614 {
3615 default:
0a1b45a2 3616 return false;
e3e9290d
AA		 3617
3618 case 336: /* sizeof(struct elf_prstatus) on s390x */
3619 /* pr_cursig */
3620 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3621
3622 /* pr_pid */
3623 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
3624
3625 /* pr_reg */
3626 offset = 112;
3627 size = 216;
3628 break;
3629 }
3630
3631 /* Make a ".reg/999" section. */
3632 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3633 size, note->descpos + offset);
3634}
3635
0a1b45a2 3636static bool
e3e9290d
AA		 3637elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3638{
3639 switch (note->descsz)
3640 {
3641 default:
0a1b45a2 3642 return false;
e3e9290d
AA		 3643
3644 case 136: /* sizeof(struct elf_prpsinfo) on s390x */
3645 elf_tdata (abfd)->core->pid
3646 = bfd_get_32 (abfd, note->descdata + 24);
3647 elf_tdata (abfd)->core->program
3648 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
3649 elf_tdata (abfd)->core->command
3650 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
3651 }
3652
3653 /* Note that for some reason, a spurious space is tacked
3654 onto the end of the args in some (at least one anyway)
3655 implementations, so strip it off if it exists. */
3656
3657 {
3658 char *command = elf_tdata (abfd)->core->command;
3659 int n = strlen (command);
3660
3661 if (0 < n && command[n - 1] == ' ')
3662 command[n - 1] = '\0';
3663 }
3664
0a1b45a2 3665 return true;
e3e9290d
AA		 3666}
3667
3668static char *
3669elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
3670 int note_type, ...)
3671{
3672 va_list ap;
3673
3674 switch (note_type)
3675 {
3676 default:
3677 return NULL;
3678
3679 case NT_PRPSINFO:
3680 {
602f1657 3681 char data[136] ATTRIBUTE_NONSTRING = { 0 };
e3e9290d
AA		 3682 const char *fname, *psargs;
3683
3684 va_start (ap, note_type);
3685 fname = va_arg (ap, const char *);
3686 psargs = va_arg (ap, const char *);
3687 va_end (ap);
3688
3689 strncpy (data + 40, fname, 16);
898ade12 3690#if GCC_VERSION == 8000 || GCC_VERSION == 8001
95da9854 3691 DIAGNOSTIC_PUSH;
be3e27bb 3692 /* GCC 8.0 and 8.1 warn about 80 equals destination size with
95da9854
L		 3693 -Wstringop-truncation:
3694 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643
3695 */
95da9854
L		 3696 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION;
3697#endif
e3e9290d 3698 strncpy (data + 56, psargs, 80);
898ade12 3699#if GCC_VERSION == 8000 || GCC_VERSION == 8001
95da9854 3700 DIAGNOSTIC_POP;
fe75810f 3701#endif
e3e9290d
AA		 3702 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3703 &data, sizeof (data));
3704 }
3705
3706 case NT_PRSTATUS:
3707 {
3708 char data[336] = { 0 };
3709 long pid;
3710 int cursig;
3711 const void *gregs;
3712
3713 va_start (ap, note_type);
3714 pid = va_arg (ap, long);
3715 cursig = va_arg (ap, int);
3716 gregs = va_arg (ap, const void *);
3717 va_end (ap);
3718
3719 bfd_put_16 (abfd, cursig, data + 12);
3720 bfd_put_32 (abfd, pid, data + 32);
3721 memcpy (data + 112, gregs, 216);
3722 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3723 &data, sizeof (data));
3724 }
3725 }
3726 /* NOTREACHED */
3727}
3728\f
4c45e5c9
JJ		 3729/* Return address for Ith PLT stub in section PLT, for relocation REL
3730 or (bfd_vma) -1 if it should not be included. */
3731
3732static bfd_vma
3733elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3734 const arelent *rel ATTRIBUTE_UNUSED)
3735{
3736 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3737}
3738
643f7afb
AK		 3739/* Merge backend specific data from an object file to the output
3740 object file when linking. */
3741
0a1b45a2 3742static bool
50e03d47 3743elf64_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
643f7afb 3744{
50e03d47 3745 if (!is_s390_elf (ibfd) || !is_s390_elf (info->output_bfd))
0a1b45a2 3746 return true;
643f7afb 3747
50e03d47 3748 return elf_s390_merge_obj_attributes (ibfd, info);
643f7afb
AK		 3749}
3750
b4cbbe8f
AK		 3751/* We may add a PT_S390_PGSTE program header. */
3752
3753static int
3754elf_s390_additional_program_headers (bfd *abfd ATTRIBUTE_UNUSED,
3755 struct bfd_link_info *info)
3756{
3757 struct elf_s390_link_hash_table *htab;
3758
93ec5e23
AK		 3759 if (info)
3760 {
3761 htab = elf_s390_hash_table (info);
3762 if (htab)
3763 return htab->params->pgste;
3764 }
3765 return 0;
b4cbbe8f
AK		 3766}
3767
3768
3769/* Add the PT_S390_PGSTE program header. */
3770
0a1b45a2 3771static bool
93ec5e23 3772elf_s390_modify_segment_map (bfd *abfd, struct bfd_link_info *info)
b4cbbe8f
AK		 3773{
3774 struct elf_s390_link_hash_table *htab;
3775 struct elf_segment_map *m, *pm = NULL;
3776
93ec5e23 3777 if (!abfd || !info)
0a1b45a2 3778 return true;
93ec5e23 3779
b4cbbe8f 3780 htab = elf_s390_hash_table (info);
93ec5e23 3781 if (!htab || !htab->params->pgste)
0a1b45a2 3782 return true;
b4cbbe8f
AK		 3783
3784 /* If there is already a PT_S390_PGSTE header, avoid adding
3785 another. */
3786 m = elf_seg_map (abfd);
3787 while (m && m->p_type != PT_S390_PGSTE)
3788 {
3789 pm = m;
3790 m = m->next;
3791 }
3792
3793 if (m)
0a1b45a2 3794 return true;
b4cbbe8f
AK		 3795
3796 m = (struct elf_segment_map *)
3797 bfd_zalloc (abfd, sizeof (struct elf_segment_map));
3798 if (m == NULL)
0a1b45a2 3799 return false;
b4cbbe8f
AK		 3800 m->p_type = PT_S390_PGSTE;
3801 m->count = 0;
3802 m->next = NULL;
3803 if (pm)
3804 pm->next = m;
3805
0a1b45a2 3806 return true;
b4cbbe8f
AK		 3807}
3808
0a1b45a2 3809bool
b4cbbe8f
AK		 3810bfd_elf_s390_set_options (struct bfd_link_info *info,
3811 struct s390_elf_params *params)
3812{
3813 struct elf_s390_link_hash_table *htab;
3814
93ec5e23
AK		 3815 if (info)
3816 {
3817 htab = elf_s390_hash_table (info);
3818 if (htab)
3819 htab->params = params;
3820 }
b4cbbe8f 3821
0a1b45a2 3822 return true;
b4cbbe8f
AK		 3823}
3824
3825
ae9a127f
NC		 3826/* Why was the hash table entry size definition changed from
3827 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3828 this is the only reason for the s390_elf64_size_info structure. */
a85d7ed0
NC		 3829
3830const struct elf_size_info s390_elf64_size_info =
3831{
3832 sizeof (Elf64_External_Ehdr),
3833 sizeof (Elf64_External_Phdr),
3834 sizeof (Elf64_External_Shdr),
3835 sizeof (Elf64_External_Rel),
3836 sizeof (Elf64_External_Rela),
3837 sizeof (Elf64_External_Sym),
3838 sizeof (Elf64_External_Dyn),
3839 sizeof (Elf_External_Note),
ae9a127f
NC		 3840 8, /* hash-table entry size. */
3841 1, /* internal relocations per external relocations. */
3842 64, /* arch_size. */
45d6a902 3843 3, /* log_file_align. */
a85d7ed0
NC		 3844 ELFCLASS64, EV_CURRENT,
3845 bfd_elf64_write_out_phdrs,
3846 bfd_elf64_write_shdrs_and_ehdr,
1489a3a0 3847 bfd_elf64_checksum_contents,
a85d7ed0 3848 bfd_elf64_write_relocs,
73ff0d56 3849 bfd_elf64_swap_symbol_in,
a85d7ed0
NC		 3850 bfd_elf64_swap_symbol_out,
3851 bfd_elf64_slurp_reloc_table,
3852 bfd_elf64_slurp_symbol_table,
3853 bfd_elf64_swap_dyn_in,
3854 bfd_elf64_swap_dyn_out,
947216bf
AM		 3855 bfd_elf64_swap_reloc_in,
3856 bfd_elf64_swap_reloc_out,
3857 bfd_elf64_swap_reloca_in,
3858 bfd_elf64_swap_reloca_out
a85d7ed0
NC		 3859};
3860
6d00b590 3861#define TARGET_BIG_SYM s390_elf64_vec
a85d7ed0
NC		 3862#define TARGET_BIG_NAME "elf64-s390"
3863#define ELF_ARCH bfd_arch_s390
ae95ffa6 3864#define ELF_TARGET_ID S390_ELF_DATA
a85d7ed0
NC		 3865#define ELF_MACHINE_CODE EM_S390
3866#define ELF_MACHINE_ALT1 EM_S390_OLD
3867#define ELF_MAXPAGESIZE 0x1000
3868
3869#define elf_backend_size_info s390_elf64_size_info
3870
3871#define elf_backend_can_gc_sections 1
51b64d56 3872#define elf_backend_can_refcount 1
a85d7ed0
NC		 3873#define elf_backend_want_got_plt 1
3874#define elf_backend_plt_readonly 1
3875#define elf_backend_want_plt_sym 0
3876#define elf_backend_got_header_size 24
5474d94f 3877#define elf_backend_want_dynrelro 1
b491616a 3878#define elf_backend_rela_normal 1
a85d7ed0
NC		 3879
3880#define elf_info_to_howto elf_s390_info_to_howto
3881
a85d7ed0
NC		 3882#define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3883#define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3884#define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
07d6d2b8 3885#define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
643f7afb 3886#define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data
a85d7ed0
NC		 3887
3888#define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3889#define elf_backend_check_relocs elf_s390_check_relocs
0451c93c 3890#define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
9d19e4fd 3891#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
a85d7ed0
NC		 3892#define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3893#define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3894#define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
0451c93c 3895#define elf_backend_reloc_type_class elf_s390_reloc_type_class
a85d7ed0
NC		 3896#define elf_backend_relocate_section elf_s390_relocate_section
3897#define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
74541ad4 3898#define elf_backend_init_index_section _bfd_elf_init_1_index_section
e3e9290d
AA		 3899#define elf_backend_grok_prstatus elf_s390_grok_prstatus
3900#define elf_backend_grok_psinfo elf_s390_grok_psinfo
3901#define elf_backend_write_core_note elf_s390_write_core_note
4c45e5c9 3902#define elf_backend_plt_sym_val elf_s390_plt_sym_val
07d6d2b8 3903#define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
b4cbbe8f
AK		 3904#define elf_backend_additional_program_headers elf_s390_additional_program_headers
3905#define elf_backend_modify_segment_map elf_s390_modify_segment_map
a85d7ed0 3906
69fc87f1
MS		 3907#define bfd_elf64_mkobject elf_s390_mkobject
3908#define elf_backend_object_p elf_s390_object_p
a85d7ed0
NC		 3909
3910#include "elf64-target.h"
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